Problem #5: Letf(x) -9x (a) Find the average rate of change of f(x) with respect to x: as X changes from x 0 to x (b) Which of the given limits is equal to the derivative of f(x)? (C) Evaluate the limit In (b) and then use the result to find the Instantaneous rate of change of f(r) at r problem 3(1+ Average rate of change. Round your answer to 2 decimals 312 312 3x2 3(x-m2 312 + gI 3 (1 + + 3x2 + Px 91 -"-312 3x2 + gx Pmblem Derivative of f(x). problem Instantaneous rate of change,