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3

Set 1: Function Notation (Beginner)

Explanation

Answer: B

PROBLEM

If f(x) = 2x + 9, find f(1).

If f(x) = 2x + 9, find f(1).

A.

13

B.

11

✓ Correct
C.

9

D.

12

Detailed Explanation

Choice B is the best answer. f(1) = 2(1) + 9 = 2 + 9 = 11

Why others are wrong:
A: 13 is incorrect because it does not satisfy the equation.
C: 9 is incorrect because it does not satisfy the equation.
D: 12 is incorrect because it does not satisfy the equation.
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