The estimated regression equaiJ'on for a model involving two independent variables and 10 observations follows. P = 2?.18?0 + DESOSXI + 0.4990X2 {a} Interpret bl in this estimated regression equation. when x is held constant. 0 bl = 0.5808 is an estimate of the change in 1! corresponding to a 1 unit change in x2 1 Dbl Dbl 0.5808 is an estimate of the change in 1! corresponding to a 1 unit change in 1:1 when x2 is held constant. when x is held constant. 0.4990 is an estimate of the change in 1! corresponding to a 1 unit change in x2 1 when x is held constant. 0 bl = 211870 is an estimate of the change in y corresponding to a 1 unit change in x1 2 Dbl 0.4990 is an estimate of the change in 1! corresponding to a 1 unit change in x1 when x2 is held constant. Interpret .02 in this estimated regression equation. O bl = 27.1830 is an estimate of the change in y corresponding to a 1 unit change in x1 when x2 is held constant. (3' b2 2 0.5808 is an estimate of the change in 1! corresponding to a 1 unit change in x1 when X2 is held constant. 0 b2 0 b2 0 bl = 0.4990 is an estimate of the change in 1! corresponding to a 1 unit change in x 2 when x1 is held constant. 0.5808 is an estimate of the change in 1! corresponding to a 1 unit change in x 0.4990 is an estimate of the change in 1! corresponding to a 1 unit change in 1:1 when x2 is held constant. 2 when x1 is held constant. (b) Predict y when x E 1 = 160 and x2 = 310