Part A: company a: y = 24d + 25 company b: y = 22d + 40 (vairable d = time in days) (y = cost)
Part B: Company a: y = 24 x (4) +25 y = 96 + 25 y = 121 Company b: y = 22 x (4) + 40 y = 88 + 40 y = 128 So Company A is the correct answer because it costs $121 Part C: Company a: y = 24 x (6) + 25 y = 144 + 25 y = 169 Company b: y = 22 (6) + 40 y = 132 + 40 y = 172