Quiz about Line of Best Fit

Question 1

Describe the correlation in the graph shown.

Accepted Answer

Strong Positive

Answer

Strong Negative

Answer

Weak Negative

Answer

Weak Positive

Question 2

What type of correlation does this scatter plot show?

Accepted Answer

negative

Answer

positive

Answer

no correlation

Answer

nonlinear association

Question 3

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

Accepted Answer

18 chapters

Answer

12 chapters

Answer

15 chapters

Answer

21 chapters

Question 4

About how many male math teachers were there in 2006?

Accepted Answer

35

Answer

15

Answer

30

Answer

45

Question 5

Based on the graph, if Joe earned $400, how many hours did he work?

Accepted Answer

25 hours

Answer

35 hours

Answer

45 hours

Answer

15 hours

Question 6

Describe the correlation in the graph shown.

Accepted Answer

Strong Negative

Answer

Strong Positive

Answer

Weak Negative

Answer

Weak Positive

Question 7

Describe the correlation in the graph shown.

Accepted Answer

Weak Negative

Answer

Strong Negative

Answer

Strong Positive

Answer

Weak Positive

Question 8

What type of correlation does this graph have?

Accepted Answer

strong positive

Answer

weak positive

Answer

none

Answer

all of the above

Question 9

What is a line of best fit used for?

Accepted Answer

To make predictions

Answer

To make the graph look pretty

Answer

To connect the points

Answer

To make it look like you know what you are doing

Question 10

What is the line of best fit?

Accepted Answer

f(x)= 1.82x + 5.02

Answer

f(x)= 5x+1.82

Answer

cannot be determined

Answer

f(x)= 1.1x + 4.2

Question 11

What is the type of correlation?

Accepted Answer

no correlation

Answer

Negative

Answer

positive

Question 12

Which scatter plot shows a linear relationship between x and y?

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

Graph D

Question 13

Which sentence describes the relationship shown on this scatter plot?

Accepted Answer

As the temperature increases, the number of visitors increases.

Answer

As the temperature decreases, the visitors increase.

Answer

As the visitors increase, the temperature decreases.

Answer

No correlation

Question 14

What would be the correlation between study time and test grades?

Accepted Answer

positive

Answer

negative

Answer

none

Answer

cannot be determined

Question 15

What would the correlation between elevation and temperature?

Accepted Answer

negative correlation

Answer

none

Answer

cannot be determined

Answer

positive correlation

Question 16

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

Accepted Answer

As x increases, y decreases

Answer

As x increases, y increases

Answer

As x decreases, y decreases

Question 17

Select the statement that best describes the line.

Accepted Answer

The line is NOT a line of best fit because it does not go through the middle of the data set.

Answer

The line is the line of best fit.

Answer

The line is NOT a line of best fit because it does not pass through two points.

Answer

The line is NOT a line of best fit because it does not go through the origin.

Question 18

The equation of the trend line
is y= 1/2x +1. Use the equation to determine the amount of time it would take to bike 20 laps.
*Look at the x and y axis first before starting the problem

Accepted Answer

11 minutes

Answer

38 minutes

Answer

41 minutes

Answer

10 minutes

Question 19

The equation of the trend line
is y= 1/2x +1. What does the x variable represent?

Accepted Answer

The number of laps

Answer

The amount of time in hours

Answer

The amount of time in minutes

Answer

How long it takes to go 0 laps

Question 20

Which of the following lines represents the line of best fit for the scatter plot?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 21

Which of the following lines represents the line of best fit for the scatter plot?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 22

Find the exponential model of the function.

Accepted Answer

y = 100(.88)^x

Answer

y = 100(8.8)^x

Answer

y = 100(1.88)^x

Answer

y = 100(.12)^x

Question 23

Write the exponential regression equation for this data.

Accepted Answer

Y = 8.16(2.7)^X

Answer

Y = 81.6(2.7)^X

Answer

Y = 8.16(.27)^X

Answer

Y = 8.16(27)^X

Question 24

Write the exponential regression equation for this data.

Accepted Answer

Y = 8.16(2.7)^X

Answer

Y = 81.6(2.7)^X

Answer

Y = 8.16(.27)^X

Answer

Y = 8.16(27)^X

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