If the correlation between X and Y is equal to −1.0, what do we know about the prediction of Y by X?
A)It's weak.
B)It's positive.
C)It's perfect.
D)It's direct.

Question

Quizplus · Accepted Answer

A correlation of -1.0 means that there is a perfect negative linear relationship between X and Y. In other words, as X increases, Y decreases in a perfectly predictable manner. Therefore, the prediction of Y by X is perfect.

If the Correlation Between X and Y Is Equal to −1.0