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2

Set 4: Function Notation (Beginner)

Explanation

Answer: B

PROBLEM

If f(x) = 2x + 8, find f(9).

If f(x) = 2x + 8, find f(9).

A.

28

B.

26

✓ Correct
C.

23

D.

25

Detailed Explanation

Choice B is the best answer. f(9) = 2(9) + 8 = 18 + 8 = 26

Why others are wrong:
A: 28 is incorrect because it does not satisfy the equation.
C: 23 is incorrect because it does not satisfy the equation.
D: 25 is incorrect because it does not satisfy the equation.
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