Asked by Moon

Given a function ƒ, which of the following represents a vertical stretch by a factor of 3?
(A) y = ƒ(3x)
(B) y = ƒ(x/3)
(C) y = 3ƒ(x)
(D) y = ƒ(x)/3
(E) y = ƒ(x)+ 3
Answered by Anonymous
c
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