GRAF is a software package developed to visualize real functions of the form y = f (x) of x = x (t), y = y (t). It also allows the study of rotations, translations, enlargements, compositions of functions and so on. The user is given uniform and easy interaction possibilities with the package. GRAF is written in the BASIC language and run on a Tektronix 4051 graphic desktop computer. This package has been developed for didactical application, particularly in high schools. It has been tested with students in many mathematic courses. © 1983.
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