Find the average rate of change of the function over the given intervals. f(x) = 10x + 10; a) [6,8], b) [-5,5] a) The average rate of change of the function f(x) = 10x + 10 over the interval [6,8] is (Simplify your answer.) Gr b) The average rate of change of the function f(x) = 10x + 10 over the interval [-5,5] is (Simplify your answer.)