Find the average rate of change of the function over the given intervals f(x) =8x +8: a) [3.5], b) [-6.6] a)I'he average rate of change of the function f(x) = 8x" + 8 over the interval [3.5] is (Simplify your answer.) b) "The average rate of change of the function f(x) = 8x" + 8 over the interval [ - 6,6] is (Simplify your answer.)