2. Section 3.1 Chapter 3 Objectives: Identify Ordered Pair Identify a Relation Identify the Domain and Range of a Relation

3. Ordered Pair Ordered Pair: Given two related elements x and y. An ordered pair that represent x and y can be written as ( x, y ). Example 1: ( 5, 3 ) is an ordered pair Example 2: ( Asma, 10) is also an ordered pair. Notes: 1.( 5, 3 ) and ( 3, 5 ) are two different pairs 2.{ 5, 3 } is not an ordered pair 3.5, 3 cannot be an ordered pair

4. Class Exercise 1 Which of the following is an ordered pair a){ ½, -3 }b) ( -3, ½ ) c) { ( 5, 0 ) } d) ( 1, - 5 ) e) -3, 6 Answer: b and d

5. Relation A set of ordered pairs is a relation Example 1: is a relation. Domain Domain: The set of all first elements in a relation is called the domain of the relation Example 1: Find the domain of each relation Domain of A = { Ahmad, Rashid, Michael } Domain of B = { 5, -4, -12, -16 }

6. Range Range: The set of all second elements in a relation is called the range of the relation Example 1: Find the range of each relation

7. Class Exercise 2 Find the domain and range of each relation

8. Home Work Do All Assigned Home Work in the Syllabus