Set 4: Linear Functions (Beginner)

**Choice D is the best answer.** f(-5) = -5 + 20 = 15

Explanation

Answer: D

PROBLEM

If f(x) = x + 20, find f(-5).

-25

100

✓ Correct

Detailed Explanation

Choice D is the best answer. f(-5) = -5 + 20 = 15

Why others are wrong:

A: -25 is incorrect because it does not satisfy the equation.

B: 100 is incorrect because it does not satisfy the equation.

C: 25 is incorrect because it does not satisfy the equation.