(13) Based on the graph of f below7 I what is the instantaneous rate of change of f at a: = 1? 8 (A) 0 (B) 1 (C) 2 (D) Between 1 and 2. a (14) Based on the graph below, the instantaneous rate of change of f at a: = a (A) is positive (B) is negative (C) f (a) (D) does not exist