Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x).
f(x) = 4 cos x; g(x) = cos x

Question

Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x).
f(x) = 4 cos x; g(x) = cos x

chris215 · Answer

vertical stretch by a factor of 4?

chris215 · Answer

wait no horizontal?

anonymous · Answer

Yes, it would be.
The range would be from [-1,1] to [-4,4]
Therefore it stretched vertically from a factor of 4.

chris215 · Answer

oh ok lol thanks

anonymous · Answer

It cant be horizontal because only the y coordinate are increasing.
If it was cos(x-pi/2) from cos(x), then it would have a horizontal or compressional factor.

anonymous · Answer

No problem!