Which value of the coefficient of correlationindicates a stronger correlation than 0.65?

A.0.55

B.-0.75

C.-0.45

D.0.60

If the correlation coefficient is 0.90, then the percentage of the variation in the dependent variabley

ythat is explained by the variation in the independent variablex

xis:

A.81%

B.0.9%

C.10%

D.90%

If the correlation coefficient is -0.975, then the slope of the regression line:

A.could be either positive or negative.

B.is also -0.975

C.is also negative.

D.is also positive.

If all of the points in a scatterplot lie directly on the regression line, then the correlation coefficient must be:

A.1

B.-1

C.either 1 or -1

D.0