# Basic radical functions

### Basic radical functions

A radical function is a function that contains a variable inside a root. By graphing out a radical function, we can easily find out its domain and range.

#### Lessons

• Introduction
Introduction to Radical Functions
• What is a radical function?
• A radical functions is a function which contains a variable inside a root, for example: $y = \sqrt x$ , $y = {^3}\sqrt{{x - 5}}$, $y = 2{^4}\sqrt{{3x - 8}} + 11$

• 1.
Basic Radical Function: $y = \sqrt x$
a)
Use a table of values, sketch the graph of the function $y = \sqrt x$ .

b)
State the domain and range.