Desmos

Graphing calculator. Features: 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 graph Tables: Input and plot data, or create an input-output table for any function Statistics: 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 grey points of interest to see their coordinates. Hold and drag along a curve to see the coordinates change under your finger.