Find intercepts, highs and lows, and intersections on the graph canvas

Tap a curve to see its intercepts, maximum and minimum points and where it crosses other lines; trace along it and zoom.

Drag the graph to move around. Pinch, or scroll with a mouse or trackpad, to zoom. The + and − buttons zoom too, and the house button returns to the standard view.
Tap or click a curve to select it. Gray dots appear at its x- and y-intercepts, its highs and lows, and where it crosses other y = lines.
Tap a gray dot to see its coordinates.
Keep your finger (or mouse button) on the curve and slide along it to trace: a dot follows the curve and shows its coordinates. It jumps onto the gray dots when you get close.
Tap an empty spot on the graph to deselect.

Tips

Coordinates are shown to four decimal places. The values are found to full precision.
For derivatives and integrals you can type them directly: y = d/dx (x^3), f'(2), int(t^2, t, 0, x), sum(n^2, n, 1, 10).

Graph equations by typing them (graph canvas)Open the graph canvas, type equations the way they are written in your textbook, and watch them drawn as you type.
Listen to a graph and use the graph canvas with a keyboardHear a curve as a rising and falling tone, get a written description of the graph, and pan, zoom and trace with keys.