The Texas Instruments Ti-nspire Graphing Calculator with Touchpad features Includes an easy-glide Touchpad that works more like a computer with a mouse, See multiple representations of a single problem - algebraic, graphical, geometric, numeric and written, Explore individual representations, one at a time, or as many as four on the same screen, Grab a graphed function and move it to see the effect on corresponding equations and data lists and Link representations - Manipulate the properties of one and observe instant updates to others without switching screens.