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5

Set 4: Linear Functions (Beginner)

Explanation

Answer: D

PROBLEM

If f(x) = 3x + 9, find f(0).

If f(x) = 3x + 9, find f(0).

A.

12

B.

0

C.

3

D.

9

✓ Correct

Detailed Explanation

Choice D is the best answer. f(0) = 3(0) + 9 = 9

Why others are wrong:
A: 12 is incorrect because it does not satisfy the equation.
B: 0 is incorrect because it does not satisfy the equation.
C: 3 is incorrect because it does not satisfy the equation.
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