Set 2: Linear Functions (Beginner)

**Choice D is the best answer.** f(5) = 4(5) - 8 = 12

Explanation

Answer: D

PROBLEM

If f(x) = 4x - 8, find f(5).

✓ Correct

Detailed Explanation

Choice D is the best answer. f(5) = 4(5) - 8 = 12

Why others are wrong:

A: 17 is incorrect because it does not satisfy the equation.

B: 20 is incorrect because it does not satisfy the equation.

C: 2 is incorrect because it does not satisfy the equation.