Do you need graph paper?
Click to Download Coordinate Plane

For a graphing calculator...

Use equations in slope intercept form to check your answers.
If y = 3x + 2... Input ONLY 3x + 2 in the box and click graph.

GeoGebra a free downloadable or webstart tool that will help with your graphs.

Graph 4.3 - a tool for graphing and graphing inequalities
You have to download the free program but it can save them as .jpg files just hit 'function' and 'insert relation' then put your equation in.

Create a Graph - a free online tool to help make graphs - you can save, e-mail, etc.