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5

Set 2: Linear Functions (Beginner)

Explanation

Answer: D

PROBLEM

If f(x) = 3x + 6, find f(1).

If f(x) = 3x + 6, find f(1).

A.

15

B.

3

C.

6

D.

9

✓ Correct

Detailed Explanation

Choice D is the best answer. f(1) = 3(1) + 6 = 9

Why others are wrong:
A: 15 is incorrect because it does not satisfy the equation.
B: 3 is incorrect because it does not satisfy the equation.
C: 6 is incorrect because it does not satisfy the equation.
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