Tools

Graphing calculator

y = ax² + bx + c · a sets the width and direction, c is the y-intercept. Drag a slider or click a value such as a = 1 and type a new number.

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What can I type?

y = 2x + 1 or just x^2 - 3: a curve.
f(x) = x^2, then f(x + 2), 2f(x), fg(x) or f^-1(x).
a = 2: a slider. Unknown letters offer a slider automatically; press ▶ to animate.
x = 3, (2, 5), y < 2x + 1 (shaded region), 0 <= y <= x^2 {1 <= x <= 3} (area under a curve), y = x^2 {x >= 0} (restricted domain).
(cos t, sin t) {0 <= t <= 2pi}: a parametric curve (used for circles and ellipses).
Drag to move, scroll or pinch to zoom. Tap a curve to read coordinates; grey dots are roots, turning points and intersections.