Function Graphing Calculator
Graph functions online, compare multiple curves, zoom and pan, mark zeros and extrema, and export a PNG image.
Function Plotter
Type f(x), draw it. Multiple curves, pan / zoom, exported PNG.
f(x)
Scroll to zoomDrag to panHover a curve for coordinates
Axis range
How to use the function graphing calculator
The function graphing calculator turns expressions of x into interactive curves. It is designed for visual understanding of algebra and functions.
- Enter an expression such as sin(x), x^2 - 4, or log(x).
- Add one or more functions to the canvas.
- Drag to pan, scroll to zoom, and export when needed.
Formula or method
A function y = f(x) assigns one y-value to each x-value in its domain.
Worked examples
Graph a parabola
Problem: y = x^2 - 4
Solution: The graph opens upward and crosses the x-axis at x = -2 and x = 2.
Compare trig functions
Problem: sin(x) and cos(x)
Solution: Plot both functions to compare phase shift and amplitude.