Graph2D is a program, which can render graphs with totally no difficulty for the user. It can help him or her with his homework, or can test some functions while doing math. Graph2D is coded with C++ and OpenGL.
A recommended game for OpenGL https://sourceforge.net/projects/quadball/?source=navbar, that will fun on a system capable of running Graph2D!
The tool should be able to draw Linear functions like: y=2x+1 Also it would be nice if the tool will have a short message telling to "click on help button to for syntax"