Graphing equations Equation Grapher

Use Equation Grapher to graph equations in 2D Cartesian coordinate system. This program is free.
Screenshot 
                      Graphing equations by the usage of equation grapherequation graphergraphing equations
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Features

Equation Grapher is a freeware
Graphing equations.
Cartesian coordinate system.
Ability to edit graphs interactively. You can move, zoom in and zoom out graphs.
Ability to save, print, cut, copy, paste and delete graphs.
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