Posted by Robby on .
A perfect positive or negative correlation means that
A) the explanatory causes the yvariable.
B) 100% of the variation is explained.
C) we get the same regression equation if we switch the x and y variables.
D) the slope of the regression equation is 1.0
I chose B

Math 
PsyDAG,
Correlation does not necessarily mean causation. I would choose c.