Relation
A relation is a set of ordered pairs.
Examples:
Examples:
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 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.)
Function
Vertical Line Test
A test use to determine if a relation is a function.
A relation is a function if there are no vertical lines that intersect the graph at more than one point.
A relation is a function if there are no vertical lines that intersect the graph at more than one point.