1. 1.4 Ordered Pairs and Relations
Objective: Students should be able to identify all the parts of a coordinate plane. Using the plane, they should be able to plot a point and construct an ordered pair given a point. They should also know the difference between a domain and range value.
1.4 Ordered Pairs and Relations

2. Coordinate Basics
Coordinate plane: intersection of horizontal (x axis) and vertical line (y axis).
Characteristics of plane.
X-axis: horizontal line
Y-axis: vertical line
Origin: (0, 0)
Ordered pairs (x, y)
Quadrants: 4

3. Plotting Points Steps: Plot following points: (2, -3), (0, 2), (-2,-5)
Start at origin
Move left(-)/right(+) based on x-coord.
Move up(+)/down(-) based on y-coord.
Plot point
Plot following points:
(2, -3), (0, 2), (-2,-5)

4. Student Examples Plot the following points A(-3, 4) B(2, 5) C(-2, -4)

5. Finding Points Steps: Find x-coordinate Find y-coordinate
Write ordered pairs
Give coordinates of point A, B, C.

6. Student Examples
List the given coordinates. A: B: C: D: E: F:

7. Information Relation: set of ordered pairs.
Domain: x coordinate, input
Range: y coordinate, output

8. Find the domain/range, set up as table, graph
(2,1) (1,5) (-2,6) (5,4)

9. Find the domain/range, set up as table, graph
(5,3)(-2,6)(2,1)(3,5)

10. Wrap up
Questions and concerns
Ic: work on homework
Hw: worksheet