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I need help on solving functions.

Evaluate the following: f(x)=3/4x+2  

  1. f(4)
  2. f(-4)
  3. f(0)
  4. f(8)
  5. f(-8)
  6. f(1/4)
  7. f(- 1/4)
  8. f(-12)
  9. f(12)
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1 Answer

In all cases, you would substitute the number in parentheses for x and solve the equation.  For example..

f(4) = 3/4 * 4 + 2

f(4) = 3 + 2

f(4) = 5

f(-4) = 3/4 * -4 + 2

f(-4) = -3 + 2

f(-4) = -1