If a function f(x) is increasing, such as the one below, what must be true about f ′(x) ? Use this idea to determine algebraically where f(x) = 3x2 − 3x + 1 is increasing. Homework Help ✎
If f(x) is increasing, then slopes are positive so f '(x) > 0.
Use the Power Rule to find f '(x).
Solve the inequality: f '(x) > 0.