p 157 #2, 3a

p 157 #4acd, 5 (y1 only), 7abc, 8abc, 9abd, 10ab

p 161 # 13, 14, 16, 18

p 174 # 1cd, 2ab, 4ab, 6bc, 7

p 176 # 11-14, 17 (Use your graphing calculator for all of them)

p 192 #2cd, 3cd, 6b, 7b, 8a, 14, 15, 16, 18, 22,