GeoGebra 3.2

GeoGebra is dynamic mathematics software that joins geometry, algebra and calculus. It is developed for learning and teaching mathematics in schools.
GeoGebra provides three different views of mathematical objects: a Graphics View, a, numeric Algebra View, and a Spreadsheet View.

They allow you to display mathematical objects in three different representations: graphically (e. g., points, function graphs), algebraically (e. g., coordinates of points, equations), and in spreadsheet cells. Thereby, all representations of the same object are linked dynamically and adapt automatically to changes made to any of the representations, no matter how they were initially created.