Need XY graph making software

Hey everyone,

I’m working on a mathematics project focused around linear programming.

I need a good way to make a clean XY graph that will show multiple points, lines and intersections.

All I need is for the graphic to be made than I can screenshot it and paste it in my document, I don’t need it to export to anything special.

GeoGebra should be able to do that.

I think this will do the trick, and yay, a Linux client!