‘A picture is worth a thousand words’

The humble pocket calculator is undergoing yet a further revolution. No longer are we satisfied with calculators that can run programs or perform all sorts of scientific, business and engineering functions at the push of a button. Calculators are now being manufactured that can produce graphs. The question remains: ‘What impact will these new calculators have on the way we teach?’. This article illustrates some of the features of one graphical calculator using linear programming and inventory control. It also discusses some of the potential benefits to be gained by using such calculators.