Quiz about Predictions Line of Best Fit

Question 1

Which line is the best fit line for this scatter plot?

Accepted Answer

c

Answer

a

Answer

b

Answer

d

Question 2

Which line is the best fit line for this scatter plot?

Accepted Answer

a

Answer

b

Answer

c

Answer

d

Question 3

Which line is the best fit line for this scatter plot?

Accepted Answer

c

Answer

a

Answer

b

Answer

d

Question 4

Which line is the best fit line for this scatter plot?

Accepted Answer

b

Answer

a

Answer

c

Answer

d

Question 5

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 6

Question 6.

Accepted Answer

y = 1.45x + 22

Answer

y = -2x + 15

Answer

y = 1.33x + 30

Answer

y = -1.5x + 24

Question 7

Which line is the best fit line for this scatter plot?

Accepted Answer

b

Answer

a

Answer

c

Answer

d

Question 8

The line of best fit _____. Check all that apply.

Accepted Answer

can be used to make predictions.

Accepted Answer

should have about the same number of points above and below.

Answer

should include outliers.

Answer

must pass through multiple points.

Question 9

Using the given scatter plot, estimate how many emails per day an 18 year old gets.

Accepted Answer

28

Answer

48

Answer

38

Answer

18

Question 10

Using the scatterplot and best fit line, estimate what the resting heart rate is after 2 hours of exercise.

Accepted Answer

72

Answer

65

Answer

85

Answer

62

Question 11

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 12

Determine the predicted income if 22 hours were worked on an assembly job.

Accepted Answer

$449.60

Answer

$207.30

Answer

$691.90

Answer

$543.30

Question 13

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

Accepted Answer

No

Answer

Yes

Question 14

What is the y-intercept?

Accepted Answer

3

Answer

-2

Answer

2

Answer

-3

Question 15

What type of association does this graph have?

Accepted Answer

negative

Answer

positive

Answer

none

Answer

all of the above

Question 16

Determine the correlation coefficient of the given data:

Accepted Answer

.9820

Answer

-.9643

Answer

1.409

Answer

.6864

Question 17

Find the equation of the line of best fit for the given data

Accepted Answer

y = 4.19x -163.41

Answer

y = 163.41x+1.49

Answer

y =- 163.41x+ 4.19

Answer

y =- 4.19x+163.41

Question 18

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 19

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

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

Graph D

Predictions Line of Best Fit

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