Set 5: Linear Functions (Beginner)

**Choice C is the best answer.** f(11) = 11 + 9 = 20

Explanation

Answer: C

PROBLEM

If f(x) = x + 9, find f(11).

119

✓ Correct

Detailed Explanation

Choice C is the best answer. f(11) = 11 + 9 = 20

Why others are wrong:

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

B: 119 is incorrect because it does not satisfy the equation.

D: 99 is incorrect because it does not satisfy the equation.