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Sunday, September 9, 2007

Quadrants - Middle School Math

In the graph below, identify what quadrant are the following ordered pairs located:
(5,4) and (-6,-3)





















(5,4) are in quadrant I and (-6.-3) are in quadrant III

The above graph represents what is termed as the rectangular or Cartesian coordinate system.
This system is constructed by drawing two perpendicular lines. The horizontal one is called
the x axis. The vertical is called the y axis. The point were the two lines cross is called the
origin. These axes divide the plane into four quadrants numbered I to IV in a counter-
clockwise direction.

The ordered pair (5,4) is located in quadrant I. In this quadrant both the x and y coordinates
are positive. Note that the number 5 in the ordered pair indicates the x coordinate. It
represents moving 5 units in the positive x direction (right). The number 4 in the ordered pair indicates the y coordinate. It represents moving 4 units units in the positive y direction (up).

The ordered pair (-6,-3) is located in quadrant III. In this quadrant both the x and y
coordinates are negatives. Note that the number -6 in the ordered pair indicates the x
coordinate. It represents moving -6 units in the negative x direction (left). The number -3 indicates the y coordinate. It represents moving -3 units in the negative y direction (down).
For additional information go to: The Quadrants of the Cartesian Plane.
©Copyright 2007.Najwa S. Hirn. All rights reserved.

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