Set 1: Function Notation (Beginner)

**Choice D is the best answer.** f(9) = 1(9) + 1 = 9 + 1 = 10

Explanation

Answer: D

PROBLEM

If f(x) = 1x + 1, find f(9).

✓ Correct

Detailed Explanation

Choice D is the best answer. f(9) = 1(9) + 1 = 9 + 1 = 10

Why others are wrong:

A: 13 is incorrect because it does not satisfy the equation.

B: 8 is incorrect because it does not satisfy the equation.

C: 9 is incorrect because it does not satisfy the equation.