Here Is An Excellent Graphing Calculator for Teachers
Desmos is a good platform for math teachers and students. Desmos is a graphing calculator that allows you to easily plot functions, create tables, add sliders, animate graphs and many more. Some of the features it provides to users include:
“Graphing: Plot polar, cartesian, or parametric graphs. There’s no limit to how many expressions you can graph at one time – and you don’t even need to enter expressions in y= form!Sliders: Adjust values interactively to build intuition, or animate any parameter to visualize its effect on the graphTables: Input and plot data, or create an input-output table for any functionStatistics: Find best-fit lines, parabolas, and more.Zooming: Scale the axes independently or at the same time with the pinch of two fingers, or edit the window size manually to get the perfect window.Points of Interest:Touch a curve to show maximums, minimums, and points of intersection. Tap the gray points of interest to see their coordinates. Hold and drag along a curve to see the coordinates change under your finger.Scientific Calculator: Just type in any equation you want to solve and Desmos will show you the answer. It can handle square roots, logs, absolute value, and more.Inequalities: Plot cartesian and polar inequalities”Watch this video to learn more about Desmos
Desmos is available on Apple Store, Google Play and on the Web.