MATH 110 Lecture Notes - Lecture 23: Inverse Relation
Document Summary
Before defining a function, it is important to define a relation. Any set of ordered pairs is called a relation. figure 1 shows a set of ordered pairs. A = {( 1, 1), (1, 3), (2, 2), (3, 4)} A graph of the set of ordered pairs ( 1, 1), (1, 3), (2, 2), (3, 4). The set of all x"s is called the domain of the relation. The set of all y"s is called the range of the relation. The domain of set a in figure 1 is { 1, 1, 2, 3}, while the range of set a is. Find the domain and range of the set of graphed points in figure 2. The domain is the set { 2, 1, 1, 3}. The range is the set { 1, 2, 3}. The relation in example has pairs of coordinates with unique first terms.
