Microcomputer Graphics

Everyone knows that a picture is worth a thousand words. In our algebra, trigonometry, and calculus courses, we acknowledge this by using graphs in our study of functions. But in courses in three-dimensional analytic geometry and multivariable calculus, many of us have been foiled when we attempted to render a three-dimensional image on a two-dimensional chalkboard in class. We have had to resort to alternatives like models, transparencies, text pictures, and hand waving. Now, thanks t o low-cost microcomputers, we have another alternative: computer graphics.