See the maths move
Type an equation and watch it appear. Built for coordinate geometry, functions, trigonometry, calculus and statistics at O Level, IGCSE and A Level.
Tap for the key points
Roots, maximum and minimum points, the y-intercept and intersections show as grey dots on the curve you choose.
Sliders and animation
Put a, b and c of a quadratic on sliders and watch the discriminant, roots and vertex change as you drag.
More than y = f(x)
Implicit equations, shaded inequalities, restrictions like {x > 0}, piecewise functions, polar and parametric curves.
Calculus built in
Plot derivatives with d/dx or f′(x), and shade the area under a curve with an integral that shows its value.
Equation, graph and table
Switch between three views of the same expressions: the algebra with roots, vertex and forms, the graph, and a table of values.
Lab data, plotted properly
Paste measurements, fit a straight line, a line through the origin or a curve, read the gradient, and download the graph with axis titles.
Phone, tablet and full screen
A maths keyboard on touch screens, pinch to zoom, and a full-screen mode for the clearest view.
Tables and best fit
Enter data by hand too, then fit a line, quadratic, exponential or power curve and read off the equation and r².
Questions
- What can I type?
- Functions like y = x² − 3x, equations in x and y like x² + y² = 25, inequalities like y > 2x + 1, polar curves like r = 2sin(3θ), parametric curves like (cos t, sin t), points like (2, 3), and definitions like f(x) = x³ that other lines can use, including f′(x).
- How do I find where two graphs meet?
- Tap one of the curves. Grey dots appear at its roots, turning points, y-intercept and wherever it crosses another curve. Tap a dot to see its coordinates, or drag along the curve to trace it.
- What are sliders for?
- Type a letter you have not defined, like y = mx + c, and press Add slider. Dragging the slider, or pressing play, shows how each number changes the graph.
- Can I share or save a graph?
- Share creates a link that opens exactly what you made. Saved graphs and your current graph stay on your device, so nothing is lost when you close the page.
- Can I plot results from a practical?
- Yes. Choose Lab data and paste your columns, with a heading row like Time / s if you have one. Pick a straight line, a line through the origin or a curve of best fit, then read the gradient and r², check residuals in the Table view, and download the graph with its axis titles and legend.
- Does it work in degrees?
- Yes. Switch between radians and degrees in the graph settings. In radians you can label the x-axis in multiples of π.