Quiz about Scatterplots and Lines of Best Fit

Question 1

What is the type of association?

Accepted Answer

no association

Answer

Negative

Answer

positive

Question 2

What type of association does this graph have?

Accepted Answer

positive

Answer

negative

Answer

none

Answer

all of the above

Question 3

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

Accepted Answer

D. 60 min

Answer

A. 50 min

Answer

B. 80 min

Answer

C. 45 min

Question 4

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 5

What type of association does this graph have?

Accepted Answer

negative

Answer

positive

Answer

none

Answer

all of the above

Question 6

Make a prediction for a resting heart rate after 6 hours of exercise a week.

Accepted Answer

55

Answer

6

Answer

50

Answer

59

Question 7

Describe the association of the scatter plot

Accepted Answer

Non-linear

Answer

Linear; positive association

Answer

Linear; negative association

Question 8

If the carpenter worked for 6 days, how much did he earn?

Accepted Answer

1500

Answer

1250

Answer

1750

Answer

2000

Question 9

What type of relationship does this scatter plot show?

Accepted Answer

Negative

Answer

Positive

Answer

No Relationship

Answer

Constant

Question 10

What type of relationship does this graph show?

Accepted Answer

No Relationship

Answer

Positive

Answer

Negative

Answer

Constant

Question 11

What type of relationship does this graph have?

Accepted Answer

Positive

Answer

Negative

Answer

No Relationship

Answer

Constant

Question 12

Based on the scatterplot, which of the following conclusions about the relationship between her height and weight is true?

Accepted Answer

There is a positive relationship between height and weight

Answer

There is a negative relationship between height and weight

Answer

There is a constant relationship between height and weight

Answer

There is no relationship between height and weight

Question 13

Which statement best represents this relationship?

Accepted Answer

As the number of miles driven increases, the amount of gas remaining in the tank decreases.

Answer

There is no relationship between the number of miles driven and the amount of gas remaining in the tank

Answer

As the number of miles driven increases, the amount of gas remaining in the tank increases.

Answer

A relationship cannot be determined from this scatter plot

Question 14

Which graph shows a line of best fit for the scatter plot?

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

Graph D

Question 15

Which data will most likely show a negative correlation when graphed on a scatter plot?

Accepted Answer

The outside temperature and the number of people wearing gloves.

Answer

The distance a student lives from school and the amount of time it takes to get to school.

Answer

The number of visitors at an amusement part and the length of the lines for the rides.

Answer

A student's height and grade point average.

Question 16

This scatter plot shows the average traffic volume and average vehicle speed on a certain freeway for 50 days in 1999.  Which statement best describes this relationship.

Accepted Answer

As traffic volume increases, vehicle speed decreases.

Answer

As traffic volume increases, vehicle speed increases.

Answer

As traffic volume increases, vehicle speed increases at first, then decreases.

Answer

As traffic volume increases, vehicle speed decreases at first, then increases.

Question 17

A researcher gathered data to predict the number of new types of plants (y) that will be in a state park after x years. After making a scatter plot of the data, she determined the equation of a line of best fit to be
y = 0.25x + 8
Based on the equation, what is the number of new types of plants that will be in the park after 24 years?

Accepted Answer

14

Answer

8

Answer

32

Answer

64

Question 18

Which equation could describe the line of best fit for this graph?

Accepted Answer

y = 5x + 236

Answer

y = -5x + 236

Answer

y = 1/5x + 236

Answer

y = -1/5x + 236

Question 19

Which graph shows the line of best fit?

Accepted Answer

Graph B

Answer

Graph A

Answer

Graph C

Answer

Graph D

Question 20

Graph has a slope of 1/2 and a y- intercept of 1.  Write the equation in slope - intercept form

Accepted Answer

y = 1/2x + 1

Answer

y = 1x+1/2

Question 21

Find the slope for the trend line using points (2,2) and (4,3)

Accepted Answer

1/2

Answer

2

Answer

-2

Question 22

If Gold's Gym paid $250 for each TV, how many did they buy?

Accepted Answer

35

Answer

30

Answer

45

Answer

20

Question 23

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 24

If a scatterplot has no association then...

Accepted Answer

...its ordered pairs have no predictable pattern

Answer

...it has no ordered pairs

Answer

...it has ordered pairs that have a negative pattern

Answer

...if it makes a lion on a graph (roar!)

Question 25

In a scatterplot, an outlier...

Accepted Answer

...is a point that is far outside the main cluster of points/ordered pairs

Answer

...is something we didn't learn 8th grade

Answer

...is a puppet with a long nose named Pinocchio

Answer

...is a really naughty point who doesn't tell the truth when outside

Question 26

Write the equation for the line.

Accepted Answer

y = 46x

Answer

y = -1/2x

Question 27

Charlie rented a moving truck. He paid a daily fee plus a per-mile fee to rent the truck. The equation below represents the daily amount Charlie paid for the truck if he drives it x miles.
y=0.5x+10
What does the slope of the graph of this equation represent?

Accepted Answer

The per-mile fee for the moving truck

Answer

The daily fee for the moving truck

Answer

How much Charlie paid for the truck

Answer

The number of miles he drove

Question 28

Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits.
y=3x+10
What does the y-intercept of the graph of this equation represent?