Given Cov(X,Y)=−12Cov(X, Y) = -12Cov(X,Y)=−12, Var(X)=16Var(X) = 16Var(X)=16, and Var(Y)=25Var(Y) = 25Var(Y)=25, what is the correlation coefficient rrr?
r=−0.3r = -0.3r=−0.3
r=−0.6r = -0.6r=−0.6
r=0.6r = 0.6r=0.6
r=−0.75r = -0.75r=−0.75