Graphing calculator
Plot any function, drag the view around, and read off the roots.
What the Graphing calculator does
Type a function and see it. Pan and zoom, trace along the curve, and the roots are marked for you, which is usually the part the question is actually asking about.
Type a function and see it. Plot several at once, drag to pan, scroll to zoom, and hover along the curve to read off values. The roots are marked for you, because where the curve crosses zero is usually the question that was actually asked.
It covers the graphs of algebra, precalculus and introductory calculus: lines, parabolas, polynomials, exponentials, logs, trig, and functions you have combined yourself. Two functions on one graph is how you see where they intersect.
More tools
A calculator, a grapher, a triangle solver, an equation balancer and a Python console. All of them run in your browser, all of them are free, and none of them need an account.
- Worksheet graderPhotograph a finished worksheet and get it graded, line by line.
- Essay graderGraded against a real rubric, or reviewed with no score at all.
- Citation generatorAPA, MLA, Chicago and Harvard, with the in-text bracket included.
- Word counterWords, characters, sentences and reading time, live as you type.
- Grammar checkerEvery error listed with the fix and the rule behind it, no rewrite.
- Answer checkerShow your working and find out exactly where it went wrong.
- Python consoleReal Python running in your browser, with charts and a console.
- SketchpadDraw the diagram or the problem, then ask the tutor about it.
- FlashcardsPaste your notes and study them as flashcards, right this minute.
- Quiz makerTurn your notes into a marked practice test you can take right now.
More about the Graphing calculator
Everything is drawn on a canvas from the same expression engine as the calculator, so what you typed there means the same thing here. Change a coefficient and the graph redraws immediately, which is the fastest way to learn what each part of a formula does.
Chat about this sends the functions and the view into the conversation. Ask what the vertex means, why the graph flattens, or how to find the roots by hand.
Why ours is better
The roots are marked.
Reading a root off a curve by eye is where marks go. The grapher computes them and labels them.
It is a graph you can question.
A picture of a curve is not an explanation. Here the same graph opens into a chat that can walk through the algebra behind the shape you are looking at.
Free, fast, and yours.
No sign-up, no ads, no limit on how many graphs you draw. It runs in your browser, so it is instant and nothing you plot is stored.
How it was built
The graphing calculator was the single biggest upgrade in the first week of tools, and the first thing built for it was the shared expression engine, so that the calculator, the grapher and every later math tool agree about what an expression means.
It loads only when someone opens it, so a page about a different tool never pays for it, and it scales to the box it is drawn in rather than the size of the screen, which is what keeps it usable on a phone.
Keep what you work on
A free account keeps your questions together by class, remembers what you have covered, and gives you a weekly allowance rather than a daily one.