The range, in most algebraic questions is all possible values of "y"
For instance:
y = x
If you graph this, it is a straight, diagonal line that goes up infinitely high, as well as down infinitely low. It does not skip any spots, so it has locations at every value of y possible (Does the line exist where y = 2? Yes. What about where y = 10.4? Yes!)
So that answer would be: Range = All Real Numbers
Parabolas, absolute value equations, and many more will give you different answers. Try checking the graph!