1. COORDINATE PLANE
DEFINITION: THE AREA FORMED BY THE INTERSECTION OF TWO NUMBER LINES
EXAMPLE:

2. X-AXIS
DEFINITION:
THE HORIZONTAL NUMBER LINE IN THE COORDINATE PLANE. (GOES LEFT TO RIGHT)

3. Y-AXIS
DEFINTION:
THE VERTICAL NUMBER LINE IN THE COORDINATE PLANE. (GOES UP AND DOWN)

4. ORIGIN
DEFINITION:
THE POINT WHERE THE X AND Y AXES INTERSECT

5. COORDINATE PLANE X AND Y AXES
THE POSITIVE X-AXIS IS TO THE RIGHT OF THE ORIGIN.
THE NEGATIVE X-AXIS IS TO THE LEFT OF THE ORIGIN.
THE POSITIVE Y-AXIS IS ABOVE THE ORIGIN.
THE NEGATIVE Y-AXIS IS BELOW THE ORIGIN.

6. ORDERED PAIRS DEFINITION: THE POINTS FOUND IN THE COORDINATE PLANE
SYMBOL: ( X, Y )
X IS THE FIRST NUMBER AND Y IS THE SECOND NUMBER IN THE ORDERED PAIR.
AN ORDERED PAIR IS NAMED BY A LETTER OF THE ALPHABET AND SHOWN BY A DOT ON THE GRAPH.

7. QUADRANTS DEFINITION:
THE FOUR AREAS FORMED BY THE INTERSECTION OF THE X-AXIS AND Y-AXIS IN THE COORDINATE PLANE.

8. QUADRANTS DEFINITION:
QUADRANTS ARE NAMED COUNTER-CLOCKWISE, QUADRANTS I, II, III, AND IV II I
III IV

9. QUADRANT I
THE AREA BOUNDED BY THE +X-AXIS AND THE + Y-AXIS THEREFORE ORDERED PAIRS FOUND IN THIS AREA HAVE BOTH X AND Y POSITIVE VALUES EXAMPLE: (3, 7)

10. QUADRANT II
THE AREA BOUNDED BY THE – X-AXIS AND + Y-AXIS, THEREFORE THE ORDERED PAIRS IN THIS AREA HAVE –X AND + Y VALUES.
EXAMPLE: (-3, 4)

11. QUADRANT III
THE AREA BOUNDED BY THE –X-AXIS AND THE – Y-AXIS, THEREFORE THE ORDERED PAIRS IN THIS AREA HAVE –X AND –Y VALUES.
EXAMPLE: (-5,-3)

12. QUADRANT IV
THE AREA BOUNDED BY THE +X -AXIS AND THE – Y-AXIS, THEREFORE THE ORDERED PAIRS IN THIS AREA HAVE +X AND – Y VALUES.
EXAMPLE: (4,-2)

13. HOW TO GRAPH AN ORDERED PAIR:
START AT THE ORIGIN
THE X-COORDINATE TELLS YOU HOW MANY UNITS TO MOVE TO THE RIGHT(POSITIVE) OR LEFT(NEGATIVE)
THE Y-COORDINATE TELLS YOU HOW MANY UNITS TO MOVE UP (POSITIVE) OR DOWN (NEGATIVE) FROM THE END OF THE X-COORDINATE.
USE A DOT TO SHOW THE LOCATION OF THE ORDERED PAIR ON THE GRAPH

14. EXAMPLES: GRAPH AND TELL WHERE THE FOLLOWING ORDERED PAIRS LIE? (2,3)
(-4,5)
(-5,-6)
(6,-4)
(0,0)
(0,4)
(5,0)
(0,-6)
(-3, 0)
(4,6)