Answer:
8
Step-by-step explanation:
Scale factor is 4
20/5=4
5*4=20
In order to vertically stretch a function by a factor k, we have to multiply the function expression by k.
So, in order to stretch the function by a factor of 1/5, we simply have to multiply:

So, if we shrink the function -5x by a factor of 1/5, we get the function -x.
Answer:
D
Step-by-step explanation:
repeat