Name: Why Do You Need to Know Functions?
Uploaded: 2023-07-26T06:54:19.424Z
Channel: House of Math
Description: Functions help us understand ourselves and the world around us. Watch this video to learn more about where functions are used in everyday life.

The simplest function is called the identity function. For every x, it returns x. The identity function is expressed as f(x) = x. This function is like a mathematical mirror reflecting back what you give it.

Functions help us understand ourselves and the world around us. Watch this video to learn more about where functions are used in everyday life.

A function is a relationship between two — or more — variables. If you input a number into a function, it can only output one value.

. By plotting these in a coordinate system you can visualize the relationship between the input, 

, of the function. This is what we mean by drawing a graph.