Question

The correlation between a​ cereal's fiber and potassium contents is requals= what fraction of the variability in potassium is accounted for by the amount of fiber that servings​ contain?

Answer 1

I found the whole exercise on the internet and R=0.903.
According to mathematics, the variability in potassium can be explained by the amount of fibre that the servings contain. By doing $R^{2}$ we find that fraction.
$0.903^{2}$=0.8154

Answer 2

THe answer is R=.9030