Assume the correlation coeffiecient between waist size and w

Assume the correlation coeffiecient between waist size and weight is r = 0.75. If this is the case, the precentage of variation in the weight variable that is explained by the regression line with waist size as the explanatory variable and weight as the response variable is:

a.) 0.7500

b.) 0.8660

c.) 0.2500

d.) 0.5625

Please explain rationale and show work

Solution