1. Lesson for Glencoe Algebra I Math
The Coordinate Plane
By: Stan Blackman
Jay High School
Lesson for Glencoe Algebra I Math
Section 4-1
Algebra I Glencoe Mathematics 2004
The McGraw Hill Companies Inc.

2. Vocabulary Words
Axes - two perpendicular number lines used for locating points
Origin – the intersection of the two axes
Y-axis – the vertical number line
X-axis – the hoizontal number line

3. The four quadrants of the coordinate plane.
Y-axis
Quadrant I
Quadrant II
X-axis
Quadrant IV
Quadrant III

4. Signs of the quadrants.
Y-axis
(+,+)
(-,+)
X-axis
(-,-)
(+,-)

5. The Ordered Pair
(5,10)
X- coordinate
Y- coordinate

6. The Origin Point
Y-axis
Origin
Point
(0,0)
X-axis

7. Always start at the origin to plot a point.

8. Direction of Movement for the X-Coordinate
Y-axis
If the x-coordinate is positive move this way
If the x-coordinate is negative move this way
X-axis

9. Direction of movement for the Y-coordinate
Y-axis
If the y-coordinate is positive move this way
If the y-coordinate is negative move this way
X-axis

10. Name the given point.
Y-axis
(1,3)
(-2,1)
X-axis
(-5,-1)
(4,0)

11. How To Plot a Point on the Coordinate Plane
Y-axis
(4,4)
Next move on the Y-axis
X-axis
(-3,-1)
First move out on the
X-axis