Which function is a horizontal compression of its parent function f(x)=x^7 by a factor of 4

Step-by-step explanation:

For example,

If we wanted to horizontally compress , we would multiply by 4 to get , and

if we wante to horizontally expand , we would multiply by to get

Since this question asks for horizontal compression, we multiply the of the function by 4. So the function we need is . The second choice is correct.

answer4 to the second power is 16

and 4 to the third power is 64,