Quiz about Scatter Plot and Line of Best Fit Review

Question 1

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 2

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 140 pages.

Accepted Answer

14 chapters

Answer

12 chapters

Answer

19 chapters

Answer

21 chapters

Question 3

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 4

Which of the following could be a possible line of best fit for the data?

Accepted Answer

y = 5/6x + 490

Answer

y = 3x + 0

Answer

y = -2x + 470

Answer

non linear

Question 5

Which equation best represents the line of best fit shown below?

Accepted Answer

y = 3x + 4

Answer

y = 4x

Answer

y = 6x + 4

Answer

y = 4x + 4

Question 6

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 7

Question 7.

Accepted Answer

y = 0.5x + 2 ; 12

Answer

y = x ; 20

Answer

y = x + 2 ; 22

Answer

y = 2 ; 2

Question 8

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 9

Imagine you're helping Zoe, Mia, and Isla find the perfect line of best fit for their scatter plot project. Which of the following lines do you think will earn them an A+?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 10

Is this line an accurate line estimate of best fit for the data?

Accepted Answer

Yes

Answer

No

Question 11

What is the equation of the line of best fit

Accepted Answer

y= -2x + 10

Answer

y= 10x+ 2

Answer

y= 10

Question 12

Which line is the best line of best fit?

Accepted Answer

b

Answer

a

Answer

c

Answer

i don't see any lines

Question 13

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

Accepted Answer

NO

Answer

YES

Question 14

The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?

Accepted Answer

D) An increase in coffee shops causes an increase in violent crimes

Answer

A) As the number of coffee shops increase, violent crimes appears to increase.

Answer

B) The line of best fit (regression line) shows a positive correlation

Answer

C) The data has a positive correlation coefficient

Question 15

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

Accepted Answer

A

Answer

B

Answer

C

Question 16

Question 16.

Accepted Answer

This residual plot represents a linear fit.

Answer

This residual plot represents a nonlinear fit.

Answer

This residual plot represents no fit.

Question 17

About how many male math teachers were there in 2006?

Accepted Answer

35

Answer

15

Answer

30

Answer

45

Question 18

Shown is a residual plot. How many positive residuals are there?

Accepted Answer

3

Answer

5

Answer

1

Answer

9

Question 19

What type of correlation does this graph have?

Accepted Answer

positive

Answer

negative

Answer

none

Answer

all of the above

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