When analyzing functions of any type, you describe what is happening within the function itself. The domain and range are two ways you have analyzed function rules in the past. Recall that the domain is the set of all x values within the function, and the range is the set of all y values within a function. In both cases a set of values needed to be expressed. One common and familiar way of listing a set of values is with an inequality. For example, the set of all numbers less than or equal to 5 is written as x ≤ 5. Another way of listing this set of values is in set builder and interval notations. Copy the diagram below into your notes, then watch the video.