# What is the domain and range of #y = x + 3 #?

##### 1 Answer

Feb 27, 2016

#### Explanation:

**Domain**

*Is there any value of #x# that will make #f(x)# undefined?*

The answer to this is no, so the domain is the set of all real numbers

**Range**

You will notice that the graph of

Therefore, the range is also the set of all real numbers

**Just keep this in mind.** When you're given a linear function, its domain and range are both the set of all real numbers (unless the problem tells you it isn't).