For the Estimated Multiple Regression Model ŷ = 30

Multiple Choice

For the estimated multiple regression model ŷ = 30  4x1 + 5x2 +3 x3, a one unit increase in x3, holding x1 and x2 constant, will result in which of the following changes in y?

A) y will increase by 3 units.
B) y will increase by 2 units, estimated, on average.
C) y will increase by 33 units
D) y will increase by 3 units, estimated, on average.