Question

Can someone help me?
I promise, a medal to the one that properly helps me. :)
(check comments for attachment)

Answer 1

How do I find it?

Answer 2

Range are the y values (x,y) is how we have our points. Where x would give the domain, and again y values gives the range :)

Answer 3

I suppose a graph is needed to understand that a bit better correct?

Answer 4

Sure, but you don't really needed it for this. The values given here are already in (x,y), so say we had a parabola so our range here then would be \[y \ge -2\]