Try another version of this question Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Find the average rate of change of `f(x) = 9 x^2 - 2` on the interval `[1, b]`. Your answer will be an expression involving `b`
Be sure your variables match those in the question `9 b + 9`