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Texas Instruments TI-80 Graphing Calculator
The TI-80 was released with Algebra and Precalculus students in mind. Like the TI-81, it has no link port and is not intended for serious programming. Features * Graphical analysis function values, roots, intersections, maximums, minimums, derivatives, and integrals * 8-line by display * Defines, saves, and graphs up to four functions and six parametric equations * Slide cover included (If anyone knows how to do the code correctly to get breaks and paragraphs please email me; I tried HTML but it apparently doesn't take HTML) Graphing calculator for Algebra through Precalculus students Large screen size 64x48 pixels, 16x8 characters display CPU 980 KHz 7K RAM memory Dimensions 

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Price: $139.9