Sometimes you are given a function on a graph and asked to find the domain and range of that function. But what are the domain and the range of a function? The examples below will hopefully make this clear.

First, let start with the definition of ‘Domain’ and ‘Range’ of a function.

Domain: All the possible x-values that the function is allowed to have.

Range: The set of all the possible y-values of that function.

Example 1 – Linear Function

Example 2 – Quadratic Function

Example 3 – Power Function (Power is a fraction)

Example 4 – Inverse Function

Example 5 – Sin Function

Multiplication - Lattice Method
Fibonacci Sequence