A Multiple Regression Model Has the Form $\hat { Y }$

Multiple Choice

A multiple regression model has the form $\hat { Y }$ = b₀ + b₁x₁ + b₂x₂.The coefficient b₁ is interpreted as the:

A) estimated change in y per unit change in x₁.
B) estimated change in y per unit change in x₁,holding x₂constant.
C) estimated change in y per unit change in x₁,when x₁ and x₂ values are correlated.
D) estimated change in y per unit change in x₂,holding x₁ constant.