Let y be Justin base pay, w% be commission, y + w%*600=350-----(1) y+w%*900= 425-----(2) From equation (1), y = 350- w%*600 = 350-6w-------(3) Substitute equation (3) into (2), 350-6w+9w=425 3w = 425-350= 75 w= 25 y = 350-6w= 350-6(25)= 200 so the function is base pay +25%of merchandise Final answer is $ (200 + 0.25x)
