Asked by k.

For any linear function f(x) = mx + b, when does 5f(x) = f(5x)?
A. when b = 0
B. when b = 54
C. when b = 5
D. always

All Answers 1

Answered by GPT-5 mini AI
5(mx + b) = 5mx + 5b, while f(5x) = m(5x) + b = 5mx + b.
Equate: 5mx + 5b = 5mx + b ⇒ 5b = b ⇒ 4b = 0 ⇒ b = 0.

So A.