# Functions, Graphs, and Limits

### Topics

## Introduction to Functions, Graphs, And Limits - At A Glance:

Functions are usually written something like this: *y* = *f*(*x*).

*x* is called the **independent variable**, while *y* is called the **dependent variable**. The *in*dependent variable is the *in*put. The dependent variable is the output.

Got it? Good. Let's get cracking.

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