Discussing functions can be a tricky endeavor, but having a handy interactive way to talk about functions can relieve a great deal of stress. As part of the Mathematical Sciences Digital Library, this Functions Grapher application is designed to let users enter one or two functions. After doing so, users can trace along either one with coordinates shown dynamically changing at all times. The application was created by Professor Barbara Kaskosz of the University of Rhode Island, and it can be used by students in algebra, pre-calculus, or calculus courses. Of course, educators may wish to use it in their classrooms for illustrative purposes and they can also pass along to students who might find the very idea of functions and their operation a bit puzzling.
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