Graph Library: Interactive Graphs of Common Functions
Pick a function below to open its graph in Plotline’s free graphing calculator, with the key facts (intercepts, asymptotes, period, domain and range) explained.
At a glance
| What it is | Interactive graphs of linear, quadratic, cubic, absolute value, square root, exponential, log, trig and polar functions. Open any graph and edit it. |
|---|---|
| Type | Interactive guide with a calculator |
| Level | High school and college |
| Price | Free, with no account or sign-up |
| Works offline | Yes, after the first visit; installs as an app |
| Made by | Aalok (aalok.builds@gmail.com) |
| Last updated | 1 November 2026 |
All graphs
- Linear equation – Graph linear equations y = mx + b online.
- Parabola (quadratic) – Graph quadratic functions y = ax² + bx + c online.
- Cubic function – Graph cubic functions online and find their roots, turning points and inflection point.
- Absolute value – Graph absolute value functions online.
- Square root function – Graph y = √x online and learn its domain, range and key points (0,0), (1,1), (4,2), (9,3).
- Reciprocal function (1/x) – Graph y = 1/x online and see its two branches and asymptotes at x = 0 and y = 0.
- Exponential function – Graph exponential functions like y = 2ˣ and y = eˣ online.
- Logarithm – Graph y = ln(x) and y = log(x) online.
- Sine graph – Graph y = sin(x) online.
- Cosine graph – Graph y = cos(x) online and compare it with sin(x).
- Tangent graph – Graph y = tan(x) online.
- Circle – Graph circles online from their equation.
- Inequality – Graph inequalities online with shaded regions.
- Polar rose – Graph polar equations online, like the rose curve r = 3 sin(4θ).
How to use the graph library
Every page opens the graphing calculator with the function already plotted, so you can move, zoom and edit it straight away.
Each guide lists the key facts for that family of functions and shows how changing the numbers in the equation transforms the graph.
How to use it in Plotline
- Choose a function from the list below.
- The graph opens ready to explore; edit the equation or drag the sliders.
- Use Save to keep your graph or Share to send it to a friend.
Frequently asked questions
Which graphs can I open here?
Linear equations, parabolas, cubic functions, absolute value, square root, reciprocal (1/x), exponential, logarithm, sine, cosine, tangent, circles, inequalities and polar rose curves. Each one opens in the graphing calculator with the equation already plotted and ready to edit.
Is it free?
Yes. The graphing calculator is free with no account and no sign-up: plot as many equations as you like, use sliders, save graphs in your browser and share them by link. It installs as an app and keeps working offline.
Learn more
Free calculators
- Graphing Calculator – Graph functions, circles, inequalities, polar and parametric equations instantly.
- Scientific Calculator – Free online scientific calculator with sin, cos, tan, inverse trig, logs, powers, roots, factorials, degrees and radians.
- Basic Calculator – A simple, free online calculator for add, subtract, multiply, divide, percent, square and square root.
- Matrix Calculator – Free matrix calculator: determinant, inverse, multiplication, transpose, RREF, rank, trace and powers, with exact fractions.
Plotline is an independent project and is not affiliated with Desmos, Texas Instruments or Casio.