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9

Set 4: Function Notation (Intermediate)

Explanation

Answer: D

PROBLEM

If f(x) = 8x + 7, find f(3).

If f(x) = 8x + 7, find f(3).

A.

33

B.

28

C.

32

D.

31

✓ Correct

Detailed Explanation

Choice D is the best answer. f(3) = 8(3) + 7 = 24 + 7 = 31

Why others are wrong:
A: 33 is incorrect because it does not satisfy the equation.
B: 28 is incorrect because it does not satisfy the equation.
C: 32 is incorrect because it does not satisfy the equation.
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