how do i find the domain and range of equations?

Question

example: f(x)=ab.solute value of x-3.

f(x)=square root 36-x^2

g(x)=-2x+2.

do i find the range by pluggin in y for the x and then solving. for example:
x=-2y+2, and then i get y=x-2/-2. and then is that how i find the range???????can i please have a detailed explanation:) thanks for your timeee

Answer 1

see your post from 4:00 pm