STUDEN 13 (3) Consider the multiple regression model: y₁ =B₁ + B₁x₁₁ + + Bx+u,,i=1,...,n. If x, increases one unit, y will increase , right? Answer: (4) Suppose the regression model y =B₁ + B₁x₁ +B₂x₂ + B,x, +u. Using the 80 observed values, we obtain SSR-100, SSE-400. Find SST. Answer: