Online Function Grapher:

Examples:

• Basic Example
• Advanced Example
• Plot implicit functions (Consume more time, please be patient.)

Gallery

• Water stream
• Tight encirclement
• Spiral
• Darts
• Nappe
• Charming Curve
• Sleepy face
• Rhythm ripple
• Little Horse made by Wang Xiaochuan

Explore functions' graphs

• Linear Function
• Cubic function
• Polynomial function
• Exponential function
• Logarithm function
• Trigonometric function
• Unit circle
• Hyperbola curve

Features:

• Fast: The graphs show just as you are typing their expressions. If you made some typos, it prompts you immediately to help correct them.
• Free: No limit on the number of function expressions. When you want to add an expression, just hit Enter key.
• Share: You can get the permanent link linking to your current work anytime so that you can save it and share it out quickly.
• Art: You can even use it as an art painter. Look at these examples and other's work, can you get some ideas about creating your owns?

Tutorial:

I haven't got time to write it yet. But it is really so simple, and you can learn to use it by looking at the examples. And then you can share your experiences to the world by publishing your usage or your problem solving steps' links to your blog, twitter, and so on. Others will get inspires from you.