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1

Set 3: Function Notation (Advanced)

Explanation

Answer: D

PROBLEM

If f(x) = 4x - 3, find x when f(x) = 9.

If f(x) = 4x - 3, find x when f(x) = 9.

A.

2

B.

4

C.

1

D.

3

✓ Correct

Detailed Explanation

Choice D is the best answer. 4x - 3 = 9. 4x = 12. x = 3

Why others are wrong:
A: 2 is incorrect because it does not satisfy the equation.
B: 4 is incorrect because it does not satisfy the equation.
C: 1 is incorrect because it does not satisfy the equation.
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