Worse, I had a primitive graphing calc in my bag that I wasn't allowed to use. Any graphing calculator will let you input an equation and show you the result. Casio's Prizm does this in reverse.

Calculators: Balancing the Equation. ... Koss first picked up a graphing calculator at a bookstore 12 ... say they might start marketing them as hand-held computers rather than calculators.

Texas Instruments recently rocked the graphing calculator world by adding a touchpad to its TI-Nspire calculator, and Casio has now come back with a technological revolution of its own: a high-res ...

Casio's hot new S100 flagship calculator will sell for just slightly more than the price of an iPhone with a two-year contract. And for that money you'll get a beautiful four-function calculator ...