Quiz about Data and Scatterplots

Question 1

What type of correlation (association)?
The outside temperature and the amount of layers you wear.

Accepted Answer

Negative correlation

Answer

Positive correlation

Answer

No correlation

Question 2

What is the type of association?

Accepted Answer

no association

Answer

Negative

Answer

positive

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

What is the correlation between length of running start and distance of jump?

Accepted Answer

positive:  the further you run the further you jump

Answer

negative: the less you run the less distance of your jump

Answer

positive: the further your running start the less your distance

Question 5

What kind of trend is shown from this scatterplot?

Accepted Answer

positive correlation

Answer

negative correlation

Answer

none

Answer

cannot be determind

Question 6

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 7

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 8

In a scatterplot, a cluster...

Accepted Answer

...is a group of points that are close together

Answer

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

Answer

...is a point on the origin

Answer

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

Question 9

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 in 8th grade

Answer

...is a point on the origin

Answer

...is a group of points that are close together

Question 10

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 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

If the debate team plans to practice for 6 hours, how many debates should they win?

Accepted Answer

24

Answer

20

Answer

16

Answer

28

Question 13

Describe the correlation in the graph shown.

Accepted Answer

Strong Positive

Answer

Strong Negative

Answer

Weak Negative

Answer

Weak Positive

Question 14

Which sentence describes the relationship shown on this scatterplot?

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 15

Molly collected data about the number of hours students studied and their scores on a test. The results are shown in the scatter plot. Which statement about the data is true?

Accepted Answer

As study hours increase, test scores increase.

Answer

As study hours increase, test scores decrease.

Answer

As study hours increase, test scores stay the same.

Answer

As study hours decrease, test scores increase.

Question 16

What type of correlation does this scatter plot show?

Accepted Answer

negative

Answer

positive

Answer

no correlation

Answer

nonlinear association

Question 17

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

Accepted Answer

y = 30x

Answer

y = (3/2) x

Answer

y = 30x + 300

Answer

y = (3/2)x + 300

Question 18

What is a scatter plot?

Accepted Answer

A graph that shows the relationship of two data sets.

Answer

A graph drawn using rectangular bars to show how large each value is.

Answer

A graph that shows information that is connected in some way.

Answer

A graph that shows data changing over time.

Question 19

The table shows the number of students on a basketball team and the number of free throws each student made during practice.  Which is the best description of this relationship? (Graphing the data on a coordinate grid may help.)

Accepted Answer

No relationship

Answer

Positive linear

Answer

Negative linear

Answer

Quadratic

Question 20

Which is an example of a linear pattern?

Accepted Answer

-5, -1, 3, 7

Answer

1/9, 2/9, 4/9, 8/9

Answer

2.3, 6.3, 9.3, 13.3

Answer

1, 2, 4, 8, 16

Question 21

Oren plants a new vegetable garden each year for 14 years.  This scatter plot shows teh relationship between the number of seeds he plants and the number of plants that grow.  Which number best represents the slope of the line of best fit through the data?

Accepted Answer

1/10

Answer

-10

Answer

-1/10

Answer

10

Question 22

Which graph best shows a positive correlation between the number of hours studied and the test scores?

Accepted Answer

Graph A

Answer

Graph B

Answer

Graph C

Answer

Graph D

Question 23

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 24

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 25

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 26

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 27

Based on the line of best fit for the scatter plot, which of the following amounts is closest to the cost of a 120-minute phone call?

Accepted Answer

$12

Answer

$10

Answer

$15

Answer

$20

Question 28

As x increases, y decreases.

Accepted Answer

negative correlation

Answer

no correlation

Answer

correlation coefficient

Answer

positive correlation

Question 29

As x increases, y increases

Accepted Answer

positive correlation

Answer

correlation coefficient

Answer

causation

Answer

negative correlation

Question 30

If Joe worked 30 hours, how much is he expected to earn?

Accepted Answer

$600

Answer

$200

Answer

$1000

Answer

$800

Question 31

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

Accepted Answer

1500

Answer

1250

Answer

1750

Answer

2000

Question 32

Use the line of best fit to approximate rate of change relative to the scatter plot above.

Accepted Answer

-5/7

Answer

7/5

Answer

5/7

Answer

-7/5

Data and Scatterplots

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