# How do you find domain and range of a rational function?

##### 1 Answer

The domain of a rational function is all real numbers that make the denominator nonzero, which is fairly easy to find; however, the range of a rational function is not as easy to find as the domain. You will have to know the graph of the function to find its range.

**Example 1**

So, the domain of

The graph of

Since the middle piece spans from

**Example 2**

So, the domain of

The graph of

Since

I hope that this was helpful.