A Multiple Regression Model Has the Form $\tilde { y } = b _ { 0 } + b _ { 1 } x _ { 1 } + b _ { 2 } x _ { 2 }$

Essay

A multiple regression model has the form $\tilde { y } = b _ { 0 } + b _ { 1 } x _ { 1 } + b _ { 2 } x _ { 2 }$ .The coefficient b₁ is interpreted as the change in the average value of y per unit change in ________ holding ________ constant.