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 Description  
 Range:  The y-coordinates of the set of points on a graph. Also, the y-coordinates of a given set of ordered pairs. The range is the output in a function or a relation.

A graph of a relation (a set of ordered pairs) is given below:

Note that the five points on the graph have the ordered pairs {(-2,1),(3,2),(4,0),(2,-3),(-2,-3)}. The range of this relation is the set {-3,0,1,2}. Notice that although -3 is a y-coordinate twice, we need only list it in the range once.