AnswersFL-1200315-Algebra 1 CRIntroduction to Modeling with Functions

Strength of Correlation Answers

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A financial advisor studies the relationship between the number of missed credit card payments and a person’s credit score. The scatterplot shows points tightly clustered around a downward-sloping line.

A
–0.91
B
–0.18
C
0.24
D
0.87
2
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Which best describes the strength of a model with an r-value of 0.29?

A
a weak positive correlation
B
a strong positive correlation
C
a weak negative correlation
D
a strong negative correlation
3

Which r-value represents the most moderate correlation?

A
–0.92
B
–0.18
C
0.56
D
0.83
4

Which relationships would most likely be causal? Select two options.

A
a negative correlation between the temperature and the amount of snow still on the ground
B
a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left
C
a positive correlation between the length of the side of a pool and its depth
D
a positive correlation between the height of a woman and the height of her brother
E
a negative correlation between the volume of water in a pot and the amount of time that the water takes to boil
5

Which r-value represents the weakest correlation?

A
–0.75
B
–0.27
C
0.11
D
0.54
6

Over five different weeks, Maria tracked how much money she spent on dining out and how much money she saved.Amount Spent on Dining Out ($)Amount Saved That Week ($)20150451106095351307580

A
There is a strong negative relationship.
B
There is a strong positive relationship.
C
There is a weak positive relationship.
D
There is little to no linear relationship.
7

Which r-value represents the strongest correlation?

A
–0.83
B
–0.67
C
0.48
D
0.79
8

Ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails.

Question illustration
A
It is a weak negative correlation, and it is not likely causal.
B
It is a weak negative correlation, and it is likely causal.
C
It is a strong negative correlation, and it is not likely causal.
D
It is a strong negative correlation, and it is likely causal.
9

A graph shows the horizontal axis numbered 4 to 16 and the vertical axis numbered 4 to 12. Points and a line show a downward trend.

Question illustration
A
–0.91
B
–0.35
C
0.35
D
0.91
10

A graph shows the horizontal axis numbered 1 to 5 and the vertical axis numbered 1 to 5. Points and a line show an upward trend.

Question illustration
A
–0.65
B
–0.19
C
0.19
D
0.75

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