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1

Set 2: Linear Functions (Beginner)

Explanation

Answer: B

PROBLEM

If f(x) = 4x + 5, find f(3).

If f(x) = 4x + 5, find f(3).

A.

20

B.

17

✓ Correct
C.

12

D.

15

Detailed Explanation

Choice B is the best answer. f(3) = 4(3) + 5 = 17

Why others are wrong:
A: 20 is incorrect because it does not satisfy the equation.
C: 12 is incorrect because it does not satisfy the equation.
D: 15 is incorrect because it does not satisfy the equation.
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