=+35. Exercise 35 of Section 3.5 gave data on x1 5 wire feed rate, x2 5 welding speed, and y 5 deposition rate of a welding process. Minitab output from fitting the multiple regression model with x1 and x2 as predictors is given here.

The regression equation is DepRate = 0.0558 + 0.375 FeedRate + 0.00278 WeldSpd Predictor Coef Stdev t-ratio p Constant 0.05580 0.07836 0.71 0.485 FeedRate 0.374917 0.007476 50.15 0.000