I came on these questions that are confusing me so much, and I've been trying all day to figure it out. *so stressed*

This is the question:

Describe how the graph of each of the following functions can be obtained from the graph of y= f(x).

Where do I get the main points for y=f(x)....(like y=x(squared))????

and how do i graph y=-5f(x)+3, when there is two variables?

and the same is asked for this function:

y=1/3f(2x-6)-9

Thank-you very much in advance!