Line of Best Fit

Question 1

Which correlation coefficient represents a moderate negative correlation?

Revolt · Accepted Answer

r = –0.64

Question 2

Which describes the correlation shown?

Revolt · Accepted Answer

strong positive

Question 3

Whose data had the strongest correlation?

Revolt · Accepted Answer

Student A

Question 4

Over five different weeks, Irina tracked the hours she spent exercising and the hours she spent playing video games. What is the strength of the correlation between the hours spent exercising and the hours spent playing video games?

Revolt · Accepted Answer

moderate negative correlation

Question 5

Question 6

Revolt · Accepted Answer

strong positive correlation

Question 6

Claudia records the hours she spent studying and her test scores for 5 tests. What is the correlation coefficient? What is the strength of the model?

Revolt · Accepted Answer

0.85; Selection 1: 0.85; Selection 2: strong positive correlation

Question 7

✔ weakmoderatestrongperfect

Revolt · Accepted Answer

weak; Selection 1: weak; Selection 2: a causation between variables

Question 8

an association between variables✔ a causation between variablesthe strength of the relationship

Revolt · Accepted Answer

a causation between variables

Question 9

What type of relationship has his teacher discovered?

Revolt · Accepted Answer

positive correlation, likely causal

Question 10

Which relationships would most likely be causal? Check all that apply.

Revolt · Accepted Answer

a positive correlation between time spent exercising and the number of calories burned; a negative correlation between temperature and coat sales; a positive correlation between time spent practicing free throws and free throw percentage

Line of Best Fit Answers

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