The marketing manager of a supermarket chain is trying to see if shelf space can predict sales for breakfast cereal. A random sample of 12 equal-sized stores is selected with the following results....

The marketing manager of a supermarket chain is trying to see if shelf space can predict sales for breakfast cereal. A random sample of 12 equal-sized stores is selected with the following results.

(a) Construct a scatter plot.

(b) Determine the coefficient of determination, R²
, and interpret its meaning.

(c) How useful do you think this regression model is for predicting sales?