Increasing, Decreasing and Extrema Worksheets
Use derivative signs and stated geometric constraints to interpret functions and rates.
Before you begin
Manipulate algebraic expressions and understand functions, limits and derivative notation.
Worked example
For f(x) = 3(x - 3)² - 2, find the intervals of increase and decrease and the minimum.
- f′(x) = 6(x - 3).
- The derivative is negative left of h and positive right of h.
Answer: Decreasing on (−∞, 3); increasing on (3, ∞). Minimum at (3, -2).
Check your result using the method in the example before moving to the next question.
Choose your level
These sets use the same exercise types and number ranges across level labels. Choose a fresh set for additional practice.
- Easy: Start with the preview and follow the worked example.
- Medium: Practice the same exercise types with a fresh numbered set.
- Hard: Use another set to practice explaining and checking your answers.
Questions and answer calculations checked on 2026-09-17. How we check worksheets. Free for personal and classroom use.
Preview and print an easy set
Try six questions below, or choose a full set at your level.
1
For f(x) = 2(x + 1)² + 0, find the intervals of increase and decrease and the minimum.
2
For f(x) = 5(x + 5)² - 1, find the intervals of increase and decrease and the minimum.
3
For f(x) = 5(x - 1)² - 5, find the intervals of increase and decrease and the minimum.
4
For f(x) = 4(x + 3)² - 1, find the intervals of increase and decrease and the minimum.
5
For f(x) = 4(x - 4)² - 3, find the intervals of increase and decrease and the minimum.
6
For f(x) = 6(x - 4)² - 2, find the intervals of increase and decrease and the minimum.
Answer Key
1. Decreasing on (−∞, -1); increasing on (-1, ∞). Minimum at (-1, 0).2. Decreasing on (−∞, -5); increasing on (-5, ∞). Minimum at (-5, -1).3. Decreasing on (−∞, 1); increasing on (1, ∞). Minimum at (1, -5).4. Decreasing on (−∞, -3); increasing on (-3, ∞). Minimum at (-3, -1).5. Decreasing on (−∞, 4); increasing on (4, ∞). Minimum at (4, -3).6. Decreasing on (−∞, 4); increasing on (4, ∞). Minimum at (4, -2).