The coordinate points below show part of the data collected by the cell phone company, where x is age in years and y is texting speed in words per minute.
(12, 16), (13, 18), (13, 10), (14, 16), (15, 9), (15, 8), (16, 17), (17, 23)
If this data was plotted on a scatterplot, would there be a relationship between the variables? If yes, explain the relationship.
Yes, there is a relationship. As age increases, texting speed also increases.
Yes, there is a relationship. As age increases, texting speed decreases.
Yes, there is a relationship. As texting speed decreases, age also decreases.
No, there is no clear relationship between age and texting speed.
Answers
Answer:
Correct choice is D
Step-by-step explanation:
Plot points (12, 16), (13, 18), (13, 10), (14, 16), (15, 9), (15, 8), (16, 17), (17, 23) on the coordinate plane. On this coordinate plane x represents age in years and y represents texting speed in words per minute.
Option A is false. Consider points A(12,16) and C(13,10). For these points x-coordinates increases, but y-coordinates decreases. Therefore, as age increases, texting speed doesn't increase.
Option B is false. Consider points A(12,16) and B(13,18). For these points both x-coordinates and y-coordinates increases. Therefore, as age increases, texting speed increases too.
Option C is false. Consider points C(13,10) and F(15,8). For these points y-coordinates decreases, but x-coordinates increases. Therefore, as texting speed decreases, age increases.
Option D is true, there is no clear relationship between age and texting speed.
Answer:
The Answer is D. No, there is no clear relationship between age and texting speed.
Step-by-step explanation:
Related Questions
A large cheese pizza costs $18. Each topping you add on cost $1.50 How much would it cost to get a large cheese pizza with c toppings added? Write your answer as an expression.
Answers
Because each topping costs 1.50 so you times it by the number of toppings which is c. That gives you 1.5c
After that you add on 18 because that’s how much the pizza costs
Hope this helps :)
A cell phone company collected data if texting speed in words per minute according to time in minutes. explain why a scatter plot is used to represent the data, including the purpose of scatter plots
Answers
Answer:
Scatter plots resembles line graphs in that they are plotted on the x and y axis. The are used because they show how much one variable is affected by another.
Scatter diagrams are important since in statistics they can show the extent of correlation, if any, between the values of observed quantities or a behavior.
Answer:
A scatter plot is defined as a diagram which uses Cartesian coordinates to display values about two variables, one indepedent, the other one dependent.
This diagrams are used in statistics to display information about surveys to a certain sample in a population. The purpose of a scatter plot is to shows if the variables are related, that is, if they have any type of linear correlation between them. If they have linear correlation, then the data is represented by a line.
Now, in this case, the independent variable is time in minutes and the dependent variable is texting. Basically, with this data, the company will be able to stablish the relation between words written in a certain time, that is, the speed of texting actually.
With a scatter plot, they would find the relation that forms the speed of texting. It could be "the more time, more text is written", or "the less time, more text is written".
If we need to establish a possible relation, the most logical would be "the more time, more word are texted".
is 50,48,14 a right angle
Answers
Answer: No
Step-by-step explanation:
A right angle is exactly 90°
To determine if 50, 48, 14 form a right angle, we need to check if the sum of the squares of the two smaller numbers is equal to the square of the largest number. The sum of 48^2 and 14^2 is equal to 50^2, so 50, 48, 14 form a right angle.
Explanation:To determine if 50, 48, 14 form a right angle, we need to check if the sum of the squares of the two smaller numbers is equal to the square of the largest number.
The largest number is 50. So, we need to check if 48^2 + 14^2 = 50^2.
48^2 equals 2304 and 14^2 equals 196. The sum of these two numbers is 2500, which is equal to 50^2. Therefore, 50, 48, 14 form a right angle.
Find the area of an equilateral triangle whose perimeter is 15 units.
Answers
Answer:
The area is 1/2×3×3= 4.5
Step-by-step explanation:
In a computer catalog, a computer monitor is listed as being 19 inches. This distance is the diagonal distance across the screen. If the screen measures 10 inches in height, what is the width of the screen to the nearest inch?
Answers
Answer:
Your answer is √261.
Step-by-step explanation:
Width of computer screen in inches is 16.15 inches
Given that;
Diagonal length of computer screen = 19 inches
Height of computer screen = 10 inches
Find:
Width of computer screen in inches
Computation:
Using Pythagorean theorem
Base = √Diagonal length² - Height²
Width of computer screen in inches = √19² - 10²
Width of computer screen in inches = √361 - 100
Width of computer screen in inches = √261
Width of computer screen in inches = 16.15 inches (Approx.)
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Calvin goes shopping over the weekend and buys a new pair of shoes,a T-Shirt, a pair of sunglasses, and a hat that costs $9. The shoes are twice as much as the shirt, and the sunglasses are half as much as the shirt. The total cost of his purchase is $65. How much does each cost?
Answers
Let the costs of shoes, t-shirt, and glasses be represented by s, t, g, respectively. The problem statement tells us these relationships:
... s = 2t
... g = t/2
... s +t +g +9 = 65 . . . . . the $9 cost of the hat is added into the total
_____
Solution
Substituting for s and g, we have ...
... 2t +t +t/2 +9 = 65
... (3 1/2)t = 56 . . . . . collect terms
... t = 56/3.5 = 16 . . . . divide by the coefficient of t
The shoes are 2t, so $32.
The t-shirt is t, so $16.
The sunglasses are t/2, so $8.
The hat is $9.
what type of property is 2 × (6+4) = 2 × 6 + 2×4
Answers
Answer:
Distributive Property
Step-by-step explanation:
Note that in the question, 2(6 + 4) we can solve it in two ways.
First way is to solve using PEMDAS, which is to solve the parenthesis first, and then the addition. However, this time, we see that the next step is 2(6) + 2(4), which suggests distributive property, which states that the multiplying number on the outside of the parenthesis is distributed to all terms within the parenthesis.
~
If a muffin calls for 1 and 3/4 cups of sugar, how many cups of sugar will be needed if only 1/4 of the recipe is being made?
Answers
Answer: 7/16 or .4375
Step-by-step explanation: 1/4 of 1 is 1/4. 1/4 of 3/4 is .1875 which also equals 3/16. Add 1/4 and 3/16 to get 7/16 cups of sugar or 0.4375. Hope this helps!
Which decimal is between 0.6 and 0.7
Answers
Answer:
0.65
Step-by-step explanation:
0.6 is short for 0.60
0.7 is short for o.7
0.61,0.62,063,0.64,0.65,0.66,0.67,0.68,0.69,0.70
0.65 is in the middle
Answer: The answer is 0.65
Step-by-step explanation:
Use the diagram to find the measurement of each of the angles
Answers
Answer:
1. ∠LOQ = 80°
2. ∠LRQ = 40°
3. ∠LBQ = 40°
Step-by-step explanation:
The measure of a central angle (angle that goes to the center of the circle) is EQUAL to the ARC from which it is intercepted. The measure of the angle that is on opposite side, on the circumference, of the circle is HALF of the ARC from which it is intercepted.It is given that ARC QL has a measure of 80.
Central angle from ARC QL (with same measure) are angle LOQ only.Opposite angles (half of measure of ARC QL) from ARC QL (on opposite side on circumference) are angles LRQ and LBQ.1.
m∠LOQ: ∠LOQ is the central angle from ARC QL so it has SAME MEASURE.
∠LOQ = 80°
2.
m∠LRQ: ∠LRQ is the opposite angle from ARC QL so it is HALF of ARC QL.
∠LRQ = [tex]\frac{1}{2}(80)=40[/tex]
∠LRQ = 40°
3.
m∠LBQ: ∠LBQ is also another opposite angle from ARC QL so it is HALF of ARC QL as well.
∠LBQ = [tex]\frac{1}{2}(80)=40[/tex]
∠LBQ = 40°
I'll Mark Brainliest!!!!!!!!!!
Real estate values in a town are increasing at a rate of 9% per year.
Mr. Townsend purchased a building for $375,000 in 2010.
How much can he expect to sell the building for in 2020, assuming this trend continues?
Enter your answer in the box.
Round to the nearest whole dollar.
$
Answers
Answer:
see below PLEASE GIVE BRAINLIEST
Step-by-step explanation:
2020 -2010 = 10 YEARS
375,000 X .09 = 33,750 2011 VALUE 33750 + 375000 = 408,750
408750 X .09 = 36787.50 2012 VALUE 445537.50
445537.50 X .09 = 40,098.38 2013 VALUE 485635.88
485635.88 X .09 = 43707.23 2014 VALUE 529343.11
529343.11 X .09 = 47640.88 2015 VALUE 576983.99
576989.99 X .09 = 51928.56 2016 VALUE 628918.55
628918.55 X .09 = 56602.67 2017 VALUE 685521.22
685521.22 X .09 = 61696.91 2018 VALUE 747218.13
747218.13 X .09 = 67249.63 2019 VALUE 814467.76
814467.76 X .09 = 73,302.10 2020 VALUE $887,769.86
Rounded to the nearest dollar: $887,770.00
The slope of the line passing through the points (7, 5) and (21, 15) is ???
Another line with a slope that is one-third that of the slope you just calculated passes through the origin and the point ???
Answers
Answer:
(21,5)
Step-by-step explanation:
To find the slope that passes through the points (7,5) and (21,15) , we use the formula
m = (y2-y1)/ (x2-x1)
= (15-5)/(21-7)
= 10/14
=5/7
We want a slope that is 1/3 this slope so we will multiply by 1/3
5/7 * 1/3= 5/21
We know the slope and one point (0,0) we can use the same formula to figure out x and y
m = (y2-y1)/ (x2-x1)
5/21 = (y2-0)/ (x2-0)
Let the tops be equal and the bottoms be equal
5 = y2-0
5 =y2
and the bottoms
21 = x2-0
21= x2
We have the point
(21,5)
Answer:
here you go
View the picture for your answer!
have a wonderful day :))
Drea and Sajini both worked at a local ice cream shop over the summer. Together, they earned a total of $425. Drea earned $25 more than Sajini. Write a system of two equations with two variables to model this problem. Use an algebraic method (substitution or linear combination) to solve the system. Graph both equations. Be sure to include the solution on your graph. How much did each person earn?
ps i can graph it myself i guess i just need the rest
Answers
Answer:
Sajini = 200
Drea = 225
Step-by-step explanation:
d = amount Drea earned
s = amount Sajini earned
Together they earned 425
d+s =425
d = s+25
The system of equations
d+s =425
d = s+25
I will use substitution to solve
Substitute d= s+25 into the first equation
d+s =425
(s+25) + s = 425
Combine like terms
2s+25 =425
Subtract 25 from each side
2s+25-25 =425-25
2s = 400
Divide by 2
2s/2 =400/2
s =200
Sajini = 200
Now we need to find d
d = s+25
d = 200 + 25
d = 225
Drea = 225
Answer:
Drea: $225
Sajini: $200
Step-by-step explanation:
D + S = 425
D = S + 25
S + 25 + S = 425
2S = 400
S = 200
D = 200 + 25 = 225
write a point-slope equation for the line that passes through the point (1,6) and is parallel to the line given by y=5x+25 do not use parenthesis on the y side
Answers
Answer:
[tex]y-6=5(x-1)[/tex]
Step-by-step explanation:
To make the line parallel, it has to have the same slope as the other. Because it is in slope-intercept form, we can see that the slope of the line is 5.
Now we have all of the numbers we need for point-slope form. The point-slope form looks like this:
[tex]y-y_{1}=m(x-x_{1})[/tex]
So when we input our values for the variables, the equation is:
[tex]y-6=5(x-1)[/tex]
Slope-intercept form:
y = mx + b
"m" is the slope, "b" is the y-intercept (relevant later)
Point-slope form:
y - y₁ = m(x - x₁) "m" is the slope
For lines to be parallel, their slopes have to be the SAME
The given line's slope is 5, so the parallel line's slope is also 5.
So you know:
m = 5
(x₁ , y₁) = (1 , 6)
Now you can plug this in:
y - y₁ = m(x - x₁)
y - 6 = 5(x - 1)
40 people adopted a manatee 30th foundation this year 30% more people adopted how many more people adopted a manatee this year
Answers
Answer:
12
Step-by-step explanation:
Change the percentage into a decimal
30% = 30/100 = 0.30
Multiply 40 with 0.30
40 x 0.30 = 12
12 more people adopted, making 52 in all.
~
Answer:
52
Step-by-step explanation:
30% more means the original 100% plus 30% more of the original 40
That's 130% = 130/100 = 1.3
"of" means x, so it's 40 x 1.3 = 52 people
Evaluate the expression a/b for a=24 and b=4
Answers
Answer:
a/b =6
Step-by-step explanation:
We want to evaluate a/b
a=24, b=4
Substitute these values into the expression
a/b =24/4
= 6
Final answer:
When evaluating the expression a/b with a=24 and b=4, the result is 6, as you simply divide 24 by 4.
Explanation:
The expression to evaluate is a/b, where a=24 and b=4.
To calculate this, simply divide the value of a by the value of b:
Step-by-step calculation:
Insert the known values into the expression: a/b = 24/4.
Divide 24 by 4 to get the result.
24 divided by 4 equals 6.
Therefore, if a=24 and b=4, the value of a/b is 6.
solve the system of equations. -5x + 8y =0
Answers
Answer:
Step-by-step explanation:
helloooooo heres the answer...X=8/5
you get this by moving your Y variable to the left by adding its opposite (-8y) to both sides.
then you should be left with -5x=-8y when in this step divide both steps by -5, which will get you 8/5 hence the answer X=8/5
How many solutions exist for the given equation?
(x + 12) = 4x – 1
zero
one
two
infinitely many
Answers
13/3
The number of solutions exist for the given equation (x + 12) = 4x – 1
is one.
What is the solution for an equation?The solution of an equation refers usually to the values of the variables involved in that equation which if substituted in place of those variable would give a true mathematical statement.
We are given that;
The equation=(x + 12) = 4x – 1
Now,
We can simplify the given equation as follows:
x + 12 = 4x - 1
Adding 1 to both sides:
x + 13 = 4x
Subtracting x from both sides:
13 = 3x
Dividing both sides by 3:
x = 13/3
Therefore, by solving equation answer will be one.
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Which line is parallel to y=3/4x-3
Answers
Final answer:
A line is parallel to y=3/4x-3 if it has the same slope of 3/4.
Explanation:
A line is parallel to y = \frac{3}{4}x - 3 if it has the same slope as the given line.
The slope of y = \frac{3}{4}x - 3 is \frac{3}{4}. So, any line with a slope of \frac{3}{4} is parallel to it.
For example, a line with the equation y = \frac{3}{4}x + 2 is parallel to y = \frac{3}{4}x - 3 because they both have the same slope, \frac{3}{4}.
Determine the domain and range. Please help!!
Answers
The domain is the set of all numbers. The range is also the set of all real numbers.
Why is this the case? Because the line extends forever in both directions along the x and y axis. We can plug in any x value and solve for y, or vice versa, and we don't have any restrictions for the input or output.
-----------------------
To write "the set of all real numbers" in interval notation, you would write [tex](-\infty, \infty)[/tex]
This is the interval from negative infinity to positive infinity, spanning the entire real number line.
What is the equivalent expression of 8b-4
Answers
You can factor out the 4 and you would get....
[tex]4(2b-1)[/tex]
rosita invested in a precious mineral. the value of the mineral tends to increase by about 12% per year. she invest 24,000 in 2014. how much will her investment be worth in 2025? round to the nearest whole dollar
Answers
2025 - 2014 = 11
11 * 12 = 132
132% of $24,000 = $31680
I think this is right but I don't sure... sorry
What is the distance from the point (4, -5) to the origin (0, 0)? Round your answer to the nearest tenth.
Answers
Answer:
6.7
Step-by-step explanation:
Answer:
6.4 is the correct answer.
Step-by-step explanation:
The sum of two consecutive whole numbers is 57. What is the value of the greater of the two numbers
Answers
[tex]n,\ n+1-\text{ two consecutive whole numbers}\\57-\text{the sum}\\\\n+n+1=57\qquad\text{subtract 1 from both sides}\\2n=56\qquad\text{divide both sides by 2}\\n=28\\\\n+1=28+1=29\\\\Answer:\ \boxed{\text{The greater of the two numbers is 29}}[/tex]
The two consecutive whole numbers that sum to 57 are 28 and 29. The solution was achieved by setting up an equation and solving for x which represents the smaller number. The greater number is 29.
Explanation:The sum of two consecutive whole numbers is 57 pertains to a simple arithmetic problem. If two consecutive numbers sum to 57, we can set up an equation to solve for the numbers. Let's call the smaller number 'x'. This means the next number would be 'x + 1' since it's consecutive, or next in line. The equation for your problem would then be x + (x + 1) = 57. Simplifying the equation gives us 2x + 1 = 57, and then subtracts 1 from both sides to get 2x = 56.
The last step is to divide both sides by 2, which gives us: x = 28. So, the smaller number is 28 and the greater number is 29.
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QUESTION WORTH 30 POINTS!
Answers
Answer:
changing by one
Step-by-step explanation:
What is the smallest possible slope for y=x^3 -3x^2 +5x -1
Answers
let's find its first derivative for "y"
[tex]\bf y=x^3-3x^2+5x-1\implies \cfrac{dy}{dx}=3x^2-6x+5[/tex]
now, we can run the quadratic formula on that derivative, and it turns out we end up with a negative radicand and therefore an imaginary/complex solution, which is a way to say there are no solutions for it, so the quadratic never touches the x-axis.
so hmmm what is the smallest value it goes down to, for the derivative, before it goes right back up?
well, for that we can simply check her vertex location.
[tex]\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ \cfrac{dy}{dx}=\stackrel{\stackrel{a}{\downarrow }}{3}x^2\stackrel{\stackrel{b}{\downarrow }}{-6}x\stackrel{\stackrel{c}{\downarrow }}{+5} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left( -\cfrac{(-6)}{2(3)}~~,~~5-\cfrac{(-6)^2}{4(3)} \right)\implies \left( 1~~,5-\cfrac{36}{12} \right) \\\\\\ (1~,~5-3)\implies (\stackrel{x}{1}~,~\stackrel{y}{2})[/tex]
so, "y" or dy/dx goes as low as 2 before going back up, and that happens when x = 1.
Check the picture below.
Step-by-step explanation:
We need to find minimum slope for y = x³ -3x² +5x -1
Slope is derivative of y
[tex]\texttt{Slope,}\frac{dy}{dx}=3x^2-6x+5[/tex]
Now we need to find minimum of 3x² -6x +5
At minimum derivative of 3x² -6x +5 is zero
That is
6x - 6 = 0
x = 1
So the slope is minimum at x = 1
At x = 1,
Slope = 3 x 1² -6 x 1 +5 = 2
Minimum slope possible for x³ -3x² +5x -1 is 2
you have one penny 1 nickel 1 dime and 1 quarter you select two coins at random. what is the probability that you will have exactly $0.15?
Answers
Answer:
the probability of getting the exact coins that make $0.15 is 33.3% (1/3)
Step-by-step explanation:
Evaluate (precalculus)
Answers
Answer:
S∞ = 7 Option C
Step-by-step explanation:
Given that:
∑21[tex](\frac{1}{4} )^{i}[/tex] i = 1 to ∞
We need to find the sum.
Firstly we will find the sequence
a₁ = [tex]21(\frac{1}{4} )^{1} = (\frac{21}{4} )[/tex]
a₂ = [tex]21(\frac{1}{4} )^{2} = (\frac{21}{16} )[/tex]
a₃ = [tex]21(\frac{1}{4} )^{3} = (\frac{21}{64} )[/tex]
a₄ = [tex]21(\frac{1}{4} )^{4} = (\frac{21}{256} )[/tex]
this sequence is geometric
So, we use sum of infinite terms
a = [tex]\frac{21}{4}[/tex]
r = [tex]\frac{\frac{21}{16} }{\frac{21}{4} } = \frac{1}{4}[/tex]
The sum of infinite terms of a GP series
S∞ = [tex]\frac{a}{1-r}[/tex]
where a is first term
r is common ratio and 0<r<1
S∞ = [tex]\frac{\frac{21}{4} }{1 - \frac{1}{4} } = \frac{\frac{21}{4} }{\frac{3}{4} }[/tex]
S∞ = 7
Mr. Logan needs to buy snacks for his daughter's soccer team. He decides to buy crackers and granola bars at a local grocery store. The price of the crackers is $9 for 3 boxes, and the price of the granola bars is $6 for 3 boxes. Mr. Logan ends up buying $20 worth of crackers and granola bars. Which equation represents the relationship between the number of boxes of crackers, x, and the number of boxes of granola bars, y, that Mr. Logan bought at the grocery store?
Answers
Answer:x=4 and y=4
Step-by-step explanation: if you divide 9 by 3 it would be 3 and 6 divided by 3 would be 2 so if you multiply 2 by 4 and 3 by 4 and you add them together it will equal 20
Answer: [tex]3x+2y=20[/tex]
Step-by-step explanation:
Let x be the number of boxes of crackers and y be the number of boxes of granola bars that Mr. Logan bought at the grocery store.
Given : The price of the crackers is $9 for 3 boxes, and the price of the granola bars is $6 for 3 boxes.
i.e. price of one box of crackers = $9 ÷3 = $3
Price of one box of granola bars=$6÷3 = $2
Mr. Logan ends up buying $20 worth of crackers and granola bars.
i.e. (Cost of each box of crackers) x + (Cost of each box of granola bars) y
i.e. [tex]3x+2y=20[/tex]
Hence, the equation represents the relationship between the number of boxes of crackers, x, and the number of boxes of granola bars, y, that Mr. Logan bought at the grocery store :
[tex]3x+2y=20[/tex]
What equation is a quadratic model for the data set? X 4, 10, 13, 17, 8, 12, 6 y 20, 86, 174, 274, 72, 135, 44
Answers
Answer:
Option C is correct.
[tex]y = 0.9673x^2-0.8475x + 10.4334[/tex] is an quadratic model equation for the data set
Step-by-step explanation:
To find the equation of the quadratic model for the given data set:
x y
4 20
10 86
13 174
17 274
8 72
12 135
6 44
We begin by entering the data into a graphing utility and displaying the scatter plot, as shown below in the figure. In the scatter plot, you can see that the data appears to follow a parabolic pattern.Using the feature of a graphing utility, you can find the quadratic model as shown below.Therefore, the quadratic model for the given data is given by;
[tex]y = 0.9673x^2-0.8475x + 10.4334[/tex]