Grade 8medium
Function Notation Practice
Practice evaluating functions using function notation f(x). Substitute the given input value for x and calculate the output.
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All 20 Practice Problems
Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.
- 1.f(x) = 2x + 3. Find f(4).
- 2.f(x) = x² - 1. Find f(3).
- 3.f(x) = 3x - 5. Find f(0).
- 4.f(x) = x + 7. Find f(-2).
- 5.f(x) = 4x. Find f(5).
- 6.f(x) = x² + 2. Find f(4).
- 7.f(x) = 5x - 10. Find f(6).
- 8.f(x) = x/2. Find f(8).
- 9.f(x) = 2x². Find f(3).
- 10.f(x) = x - 9. Find f(15).
- 11.g(x) = 3x + 1. Find g(7).
- 12.h(x) = x² - 5. Find h(4).
- 13.f(x) = -2x + 8. Find f(3).
- 14.g(x) = x³. Find g(2).
- 15.f(x) = 6x - 4. Find f(-1).
- 16.h(x) = x/3 + 2. Find h(9).
- 17.f(x) = x² + x. Find f(5).
- 18.g(x) = 4x - 7. Find g(0).
- 19.f(x) = 10 - x. Find f(4).
- 20.h(x) = 2x + 1. Find h(10).
Show answer key
- 1.f(x) = 2x + 3. Find f(4). Answer: 11
- 2.f(x) = x² - 1. Find f(3). Answer: 8
- 3.f(x) = 3x - 5. Find f(0). Answer: -5
- 4.f(x) = x + 7. Find f(-2). Answer: 5
- 5.f(x) = 4x. Find f(5). Answer: 20
- 6.f(x) = x² + 2. Find f(4). Answer: 18
- 7.f(x) = 5x - 10. Find f(6). Answer: 20
- 8.f(x) = x/2. Find f(8). Answer: 4
- 9.f(x) = 2x². Find f(3). Answer: 18
- 10.f(x) = x - 9. Find f(15). Answer: 6
- 11.g(x) = 3x + 1. Find g(7). Answer: 22
- 12.h(x) = x² - 5. Find h(4). Answer: 11
- 13.f(x) = -2x + 8. Find f(3). Answer: 2
- 14.g(x) = x³. Find g(2). Answer: 8
- 15.f(x) = 6x - 4. Find f(-1). Answer: -10
- 16.h(x) = x/3 + 2. Find h(9). Answer: 5
- 17.f(x) = x² + x. Find f(5). Answer: 30
- 18.g(x) = 4x - 7. Find g(0). Answer: -7
- 19.f(x) = 10 - x. Find f(4). Answer: 6
- 20.h(x) = 2x + 1. Find h(10). Answer: 21
About This Practice
This practice set includes 20 function notation problems. Understanding functions is fundamental for algebra, graphing, and mathematical modeling.
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