1. Graphing in the Coordinate Plane
By, Mrs. Muller

2. Key Vocabulary
Number lines: a line on which numbers are marked at intervals, used to illustrate simple numerical operations.
Coordinate plane: a grid formed by intersection of two number lines.
Y-axis: a vertical number line
X-axis: the horizontal number line
Quadrants: the axes divide the plane into 4 sections
Origin: where the axes intersect
Quadrant II
Quadrant I
X-axis
Quadrant
III
Quadrant IV
origin
Y-axis

3. More Key Vocabulary
Order Pair: (x,y) gives the coordinates of a point’s location.
X-coordinate: displays the position to the right or left of the y-axis (where on the x-axis it is located)
Y-coordinate: shows the position above or below the x-axis (where on the y-axis it is located)
Where have you seen coordinate planes before?
Y-coordinate
X-coordinate

4. Uses of This Math Digital Sound Waves Location on a map
Roller Coaster Design

5. More Uses Satellite Navigation Location of an Air Transport Economy
Rockets and Satellites
And many more

6. How to Locate the Point on A Graph
First see where it is located on the x-axis; that will be your x-coordinate
Record that point in the order pair where the x goes.
Second see where it is located on the y-axis; that will be your y-coordinate
Record that point in the order pair where the y goes.
Remember that an order pair is written like this: (x,y)

7. Example of Finding the Point’s Location
Find the locations of the blue dot, green dot, red dot, and yellow dot
Blue dot:
Green dot:
Red dot:
Yellow dot:

8. How to Graph a Point
First you look at the x-coordinate of the order pair.
You move your finger to that spot.
Then you look at the y-coordinate of the order pair.
You move your finger from the x-axis up to that location on the y-axis.
See the example on the next page for clarity.

9. Graphing a Point
(3,2)
(-4,3)
(-2,-4)
(5,-2)