2. Example 1: Name an Ordered Pair Example 2: Name an Ordered Pair
Main Idea
New Vocabulary
Example 1: Name an Ordered Pair
Example 2: Name an Ordered Pair
Example 3: Graph Ordered Pairs
Example 4: Graph Ordered Pairs
Key Concept: Relations
Example 5: Relations as Tables and Graphs
Example 6: Real-World Example: Relations as Tables and Graphs
Lesson Menu

3. Graph rational numbers on the coordinate plane and use the coordinate plane to represent relations.
Main Idea

4. coordinate plane x-coordinate y-coordinate relation domain range
origin
y-axis
x-axis
quadrants
ordered pair
Vocabulary

5. Name the ordered pair for point A.
Name an Ordered Pair
Name the ordered pair for point A.
● Start at the origin.
● Move right to find the x-coordinate of Point A, which is 2.
● Move up to find the y-coordinate, which is
Answer: So, the ordered pair for Point A is
Example 1

6. Name the ordered pair for point A.B. C. D.
Example 1 CYP

7. Name the ordered pair for point B.
Name an Ordered Pair
Name the ordered pair for point B.
● Start at the origin.
● Move left to find the x-coordinate of Point B, which is –2
● Move down to find the y-coordinate, which is –2.
Answer: So, the ordered pair for Point B is
Example 2

8. Name the ordered pair for point B.C. D.
Example 2 CYP

9. Graph J(–3, 2.75) on a coordinate plane.
Graph Ordered Pairs
Graph J(–3, 2.75) on a coordinate plane.
● Start at the origin and move 3 units left. Then move up 2.75 units.
● Draw a dot and label it J(–3, 2.75).
Example 3

10. Graph Ordered Pairs
Answer:
Example 3

11. Graph M(–2, –3.25) on a coordinate plane.
A. B.
C. D.
Example 3 CYP

12. Graph on a coordinate plane.
Graph Ordered Pairs
Graph on a coordinate plane.
● Start at the origin and move 4 units right. Then move down or units.
● Draw a dot and label it
Example 4

13. Graph Ordered Pairs
Answer:
Example 4

14. Graph on a coordinate plane.
A. B.
C. D.
Example 4 CYP

15. Key Concept

16. Relations as Tables and Graphs
Express the relation {(4, 2), (6, –1), (5, –3), (–2, –3)} as a table and a graph. Then state the domain and range.
Place the ordered pairs in a table with x-coordinates in the first column and the y-coordinates in the second column.
Example 5

17. Relations as Tables and Graphs
Graph the ordered pairs on a coordinate plane.
Answer: The domain is {–2, 4, 5, 6}. The range is {–3, –1, 2}.
Example 5

18. A. domain: {–4, 2, 3, 6}; range: {–8, 0, 1, 5}
State the domain and range of the relation {(3, 5), (–4, 0), (2, –8), (6, 1)}.
A. domain: {–4, 2, 3, 6}; range: {–8, 0, 1, 5}
B. domain: {2, 3, 4, 6}; range: {0, 1, 5, 8}
C. domain: {–8, 0, 1, 5}; range: {–4, 2, 3, 6}
D. domain: {3, –4, 2, 6}; range: {5, –8, 1}
Example 5 CYP

19. Relations as Tables and Graphs
A. PIES Mike is buying pies for a party. The price for 1 pie is $4.
Make a table of ordered pairs in which the x-coordinate represents the number of pies and the y-coordinate represents the total cost for 2, 3, 4, and 5 pies.
Answer:
Example 6

20. Relations as Tables and Graphs
B. PIES Mike is buying pies for a party. The price for 1 pie is $4.
Graph the ordered pairs.
Answer:
Example 6

21. A. RINGTONES Caden can download ringtones for his cellular phone for $2.00 each. Make a table of ordered pairs in which the x-coordinate represents the number of ringtones and the y-coordinate represents the total cost for 2, 3, 4, and 5 ringtones.
A. B.
C. D.
Example 6A CYP

22. B. RINGTONES Caden can download ringtones for his cellular phone for $2.00 each. Graph the ordered pairs in which the x-coordinate represents the number of ringtones and the y-coordinate represents the total cost for 2, 3, 4, and 5 ringtones.
A. B.
C. D.
Example 6B CYP