Remember what we learned about r-values…​

r = -1

r = -0.5

r = 0

r = 0.5

r = 1

perfect negative correlation

moderate negative association

no correlation

moderate positive association

perfect positive correlation

For each of the scatter plots below, draw a predictor line that seems like the best fit. Describe the correlation in terms of Direction and Strength, then estimate the r-value as being close to -1, -0.5, 0, +0.5, or +1.

A

Direction:

Positive

Negative

None

Strength:

Strong

Weak

r:

B

Direction:

Positive

Negative

None

Strength:

Strong

Weak

r:

C

Direction:

Positive

Negative

None

Strength:

Strong

Weak

r:

D

Direction:

Positive

Negative

None

Strength:

Strong

Weak

r:

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