Question

help!
Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=9cosx
g(x)=cosx


a.


Vertical stretch by a factor of 9


c.


Vertical shrink by a factor of 1/9




b.


Horizontal stretch by a factor of 9


d.


Horizontal shrink by a factor of 1/9 @Catlover5925 @jordanloveangel

Answer 1

1/9 f(x) = g(x)

thats a stretch factor (1 / 1/9) = 9
parallel to the y-axis

Answer 2

f(x) is nine times bigger than g(x), so f(x)'s line is 9 times higher than g(x).