What transformation occurs in the function compared to ?

Question

A

Compress horizontally by a factor of

, then stretch vertically by a factor of 9

B

Stretch horizontally by a factor of 4, then compress vertically by a factor of

C

Stretch horizontally by a factor of 4, then stretch vertically by a factor of 9

D

Compress horizontally by a factor of

, then compress vertically by a factor of