When learning about functions in math, it's important to know what domain and range mean.

Domain is all the possible input values (or 'x' values) that a function can take. For example, in the function ( f(x) = \sqrt{x} ), the domain is ( x \geq 0 ). This means you can't use negative numbers because you can’t find the square root of a negative number.

Range tells us all the possible output values (or 'y' values) that the function can give. For the same function, ( f(x) = \sqrt{x} ), the range is also ( y \geq 0 ). This is true because the square root will only give results that are zero or higher.

Here’s a quick recap:

• Domain: Input values (for ( f(x) = \sqrt{x} ), it’s ( x \geq 0 ))
• Range: Output values (for ( f(x) = \sqrt{x} ), it’s ( y \geq 0 ))

Understanding these ideas will help you with drawing graphs of functions and figuring out how they work!