# A study investigating the relationship between weight x (in hundreds of pounds)

A study investigating the relationship between weight x (in hundreds of pounds) and the fuel economy y(in miles per gallon) of 50 randomly selected new light vehicles yielded r = -0.87, and the regression equation: y-hat = -0.82x +48.7. For each additional 100 pounds in weight, the average fuel economy is predicted toNote: y-hat represents the predicted y-value or the symbol for the predicted y in regressionA- decrease by 0.87B- decrease by 0.82C- increase by 0.82D- increase by 0.87E- estimated change can not be estimated with information given