Set 5: Function Notation (Beginner)

**Choice D is the best answer.** f(9) = 3(9) + 3 = 27 + 3 = 30

Explanation

Answer: D

PROBLEM

If f(x) = 3x + 3, find f(9).

✓ Correct

Detailed Explanation

Choice D is the best answer. f(9) = 3(9) + 3 = 27 + 3 = 30

Why others are wrong:

A: 33 is incorrect because it does not satisfy the equation.

B: 29 is incorrect because it does not satisfy the equation.

C: 27 is incorrect because it does not satisfy the equation.