An Estimated Multiple Regression Model Has the Form ŷ =

An estimated multiple regression model has the form ŷ = 100 − 2x1 + 9x2. As x1 increases by 1 unit while holding x2 constant, which of the following best describes the change in y?

A) y will increase by 2 units, estimated, on average.
B) y will decrease by 98 units, estimated, on average.
C) y will increase by 98 units, estimated, on average.
D) y will decrease by 2 units, estimated, on average.