X 1 2 -3 2 3 4 3 4 2 2 4 6 4 3 N/- 4. The average rate of change of function fon [1,4] is (A) 7/6 (B) 4/3 (C) 15/8 (D) 15/4 5. If h(x) = g(f(x] ] then h' (3) = (A) 1/2 (B) 1 (C 4 (D) 6