We want to predict the weekly cost of groceries from the num

We want to predict the weekly cost of groceries from the number of individuals in a household. In trying to construct the regression equation, we know the mean number of people in a household is 3.25 and the mean weekly grocery bill is $130. If the slope of the regression is b=22 what is the Y intercept, a?

A) 3.25

B) -58.5

C) 22

D) 58.5

E) 400.5

Solution

B) -58.5