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1

Set 1: Function Notation (Intermediate)

Explanation

Answer: A

PROBLEM

If f(x) = 5x - 1, find x when f(x) = 9.

If f(x) = 5x - 1, find x when f(x) = 9.

A.

2

✓ Correct
B.

5

C.

1

D.

3

Detailed Explanation

Choice A is the best answer. 5x - 1 = 9. 5x = 10. x = 2

Why others are wrong:
B: 5 is incorrect because it does not satisfy the equation.
C: 1 is incorrect because it does not satisfy the equation.
D: 3 is incorrect because it does not satisfy the equation.
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