How to know when there is a vertical dilation or a horizontal dilation?

Given a function and a number , if you multiply the whole function by , you have a vertical dilation:

If , you follow the same steps as before, but you also reflect the function around the x-axis.

If, instead, you multiply only the argument by , you have a horizontal dilation:

If , you follow the same steps as before, but you also reflect the function around the y-axis.

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo