Use function notation to make meaningful connections between expressions, tables, and other mathematical objects. Autofill tables by defining column headers with functions, or build a movable point to trace a path along a particular curve. Get started with the video on the right, then dive deeper with the resources and challenges below.

## Pro-Tips

You can evaluate a function at a certain point:

You can use the notation f(x,y), for example, to define a function with more than one variable:

Defining a function once allows you to use this function within other functions.

You can combine multiple functions together to create a separate function or you can create a composite function.

You can use a function on points! This example scales the points by a factor of 2, and translates -2 units vertically. Explore this graph.

## Functions in Action

### "The best way to learn is to do." – Paul Halmos

### Graphing Challenges

Stretch your skills with graphing challenges.

### Example Graphs

Learn more by exploring example graphs.