The two "y=" is because they are trying to describe to you the region which to rotate.

On a graph, draw the horizontal line at y=2, and shade everything below it.

Next, draw the vertical line at x=0 and shade everything to right (positive).

Next, draw the line y=2x and shade everything above it. This triangular region that results from the overlap of all three shaddings is the region we are rotating.

Hopefully that gets you started. I think if you figure out the correct region you'll probably be able to get going from there. If not, let me know.