This graphing calculator is simple and easy-to-use. With over 600 built-in functions, the HP 9g is ideal for solving intricate math and science problems, at school, in the lab, or on the road. The HP 9g has a split screen for viewing graphs and equations, a simple-to-use graph key and adjustable contrast screen. Solve logs, powers, and roots or edit 1 and 2-variable statistics, calculate permutations, combinations, factorials, logical functions and more.