Digital PSAT Math Practice Question 64: Answer and Explanation

Question: 64

If g(x) = 9x + 2, what does g(-4x) equal?

• A. -36x - 8
• B. -36x + 2
• C. 5x + 2
• D. -36x² + 2

Correct Answer: B

Explanation:

(B) For this question, we simply plug in -4x for every x in the original function:

This answer matches choice (B).