GED Practice

GED Math Review: Evaluating Functions


Questions:
A. Find f(x) for x = 3, 2, 1, and 0


  1. f(x) = 3x - 1
  2. f(x) = 5x² - x
  3. f(x) = -x² - 3x + 6

    B. Evaluate each function.
  4. Find f(-2) for f(x) = 13 - 4x.
  5. Find f(5) for f(x) = 3x² + 4.
  6. Find f(8) for x² - 4x + 2.
  7. Find f(-4) for -x² + 7x + 3.
  8. Find f(-3) for f(x) = 10x + 8.
  9. Find f(7) for -6x² + x - 10.
  10. Find f(3) for f(x) = 4x² - 9x + 5
Answers:

  1. 8, 5, 2, and -1
  2. 42, 18, 4, and 0
  3. -12, -4, 2, and 6
  4. 21
  5. 79
  6. 34
  7. -41
  8. -22
  9. -297
  10. 14





Reference:


Complete Test Preparation for the GED Test 2014 by Steck-Vaughn