Relations and Functions.pdf - andaFunction TopicIndex|Algebra2\/TrigIndex| Relation: (thexvalues,formthedomain.Thesecondelements intheordered

# Relations and Functions.pdf - andaFunction...

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7/29/2016 Relations and Functions 1/2 Definition of a Relation and a Function Topic Index | Algebra2/Trig Index | Regents Exam Prep Center Relation: A relation is simply a set of ordered pairs. The first elements in the ordered pairs (the x ­values), form the domain . The second elements in the ordered pairs (the y ­values), form the range. Only the elements "used" by the relation constitute the range. This mapping shows a relation from set A into set B. This relation consists of the ordered pairs (1,2), (3,2), (5,7), and (9,8). • The domain is the set {1, 3, 5, 9}. • The range is the set {2, 7, 8}. ( Notice that 3, 5 and 6 are not part of the range. ) • The range is the dependent variable. The following are examples of relations. Notice that a vertical line may intersect a relation in more than one location. This set of 5 points is a relation. {(1,2), (2, 4), (3, 5), (2, 6), (1, ­3)} Notice that vertical lines may intersect more than one point at a time.