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Unit 3 Part 2 Review

Total questions: 33

Worksheet time: 8hrs 15mins

Name
Class
Date
1.
Which scatter plot shows a linear relationship between x and y?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
2.
Select the statement that best describes the line.
a)
The line is the line of best fit.
b)
The line is NOT a line of best fit because it does not pass through two points.
c)
The line is NOT a line of best fit because it does not go through the middle of the data set.
d)
The line is NOT a line of best fit because it does not go through the origin.
3.
Which of the following lines represents the line of best fit for the scatter plot?
a)
A
b)
B
c)
C
d)
D
4.
a)
Positive, strong
b)
Positive, weak
c)
Negative, strong
d)
Negative, weak
5.
a)
Positive, strong
b)
Positive, weak
c)
Negative, strong
d)
Negative weak
6.
a)
Positive, strong
b)
Positive, weak
c)
Negative, strong
d)
Negative, weak
7.
a)
Positive, strong
b)
Positive, weak
c)
Negative, strong
d)
Negative, weak
8.
a)
Positive, strong
b)
Positive, weak
c)
Negative, strong
d)
Negative, weak
9.
a)
Positive, strong
b)
Positive, moderate
c)
Negative, strong
d)
Negative, moderate
10.
Rank these scatter plots according to the intensity of the correlation represented, from weakest to strongest.
a)
1, 2, 3, 4
b)
2, 4, 3, 1
c)
4, 3, 2, 1
d)
1, 3, 4, 2
11.

Which sentence describes the relationship shown on this scatter plot?

a)

As the temperature decreases, the visitors increase.

b)

As the temperature increases, the number of visitors increases.

c)

As the visitors increase, the temperature decreases.

d)

No correlation

12.

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 12 absences should get approximately what score on the final exam?

a)

60

b)

92

c)

70

d)

76

13.

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

a)

25 hours

b)

35 hours

c)

45 hours

d)

15 hours

14.
As the age of the car increases, its value decreases. Which scatterplot represents this relationship?
a)
A
b)
B
c)
C
d)
D
15.
What represents the x axis?
a)
ABC Company
b)
Hours Worked
c)
Amount Earned in Dollars
d)
Hours in Car
16.
The number of siblings you have and your weight. 
a)
Positive correlation
b)
Negative correlation
c)
No correlation
d)
All of the above
17.
The age of a kitten and its weight.
a)
positive association
b)
negative association
c)
no association
18.

Which scatterplot has a stronger relationship?

a)
b)
19.

Julie made 25 international long-distance phone calls to London last month. The scatterplot below shows the length and cost of each phone call she made. Which conclusion is best supported by the scatterplot?

a)

As the length of a call increases, the cost of the call increases.

b)

As the length of a call increases, the cost of the call remains the same.

c)

As the length of a call increases, the cost of the call decreases.

d)

There is no relationship between the length of a call and the cost of a call.

20.

The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries. Which statement best describes the association between the number of people in a household and the average amount of money spent on groceries?

a)

As the number of people in the household increases, the average amount of money spent on groceries decreases.

b)

As the number of people in the household increases, the average amount of money spent on groceries increases.

c)

As the number of people in the household decreases, the average amount of money spent on groceries increases.

d)

There is no apparent association between the number of people in the household and the average amount of money spent on groceries.

21.

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

a)

positive association; the further your running start, the more distance of your jump

b)

negative association; the less your running start, the less distance of your jump

c)

positive association; the further your running start, the less distance of your jump

d)

negative association; the further your running start, the more distance of your jump

22.
A keyboarding instructor at a community college collected data comparing a student's age and their typing speed. The equation for the line of best fit is given as:
y = -1.4x + 117.8
If you are 25 years of age (x), what is your typing speed (y)?
a)
153 words per minute
b)
83 words per minute
c)
63 words per minute
d)
102 words per minute
23.
Joe tracked the height of his Dalmatian puppy from age 13 weeks to 25 weeks. He graphed the data and determined the line of best fit is y = 1.12x + 28.78. What does the slope represent in this situation?
a)
The puppy weighed 28.78 pounds at age 13.
b)
For every week that goes by, the puppy gains 1.12 pounds.
c)
The puppy gains a pound every 1.12 weeks.
d)
The puppy weighs 1.12 pounds when it was born.
24.
A baseball coach graphs some data and finds the line of best fit. The equation for the line of best fit is
y = 0.32x - 20.51, where x is the number of times at bat and y is the number of hits.
How many hits should be expected from a player who is at bat 175 times?
a)
35 hits
b)
49 hits
c)
609 hits
d)
62 hits
25.
A veterinarian student tracks the weight of a kitten, in ounces, from the age of 0 to 32 weeks. She graphs the data and determines the line of best fit is y = 4.03x + 3.27. What does the y-intercept represent in this situation?
a)
The kitten weighs 3.27 ounces when it's born.
b)
The kitten weighs 4.03 ounces when it's born.
c)
The kitten gains 3.27 ounces a week.
d)
The kitten gains 4.03 ounces a week.
26.

Given the following Scatter Plot, select the option that is most likely the r value.

a)

r=.27r=.27

b)

r=−.862r=-.862

c)

r=.934r=.934

d)

r=.54r=.54

27.

Given the following Scatter Plot, select the option that is most likely the r value.

a)

r=−.1r=-.1

b)

r=−.981r=-.981

c)

r=.92r=.92

d)

r=.765r=.765

28.

If r=0, there is a strong correlation.

a)

True

b)

False

29.

r = -0.3 is considered to have...

a)

moderate negative correlation

b)

weak negative correlation

c)

no correlation

d)

strong negative correlation

30.

Estimate the correlation coefficient for this scatterplot.

a)

A) r = -0.9

b)

B) r = 1

c)

C) r = 0.9

d)

D) r = -1

31.
How do you calculate a residual?
a)
Observed - Predicted
b)
Predicted - Observed
32.

Estimate the correlation of the scatterplot

a)
This residual graph represents a linear fit.
b)
This graph represents a nonlinear fit.
c)
This residual graph represents no fit.
33.
Shown is a residual plot. Would a linear regression model of the data be most appropriate?
a)
YES
b)
NO

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