Quadrants and Reading Ordered Pairs Coordinate Graphing Quadrants and Reading Ordered Pairs TeacherTwins©2015

Warm Up Graph the integers on a number line. -5 , - 2, 5, 2 0, -3, 7, -2 -4, 1, -6, 8 -1, 4, -7, 0 6, -8, 5, -4

Warm Up (Answers) Graph the integers on a number line. 1. 2. 3. 4. 5.

Quadrants and Reading Ordered Pairs Coordinate Graphing Quadrants and Reading Ordered Pairs

The coordinate plane is formed by the intersection of two number lines.

Origin, the point where the two number lines intersect y-axis, it is the vertical number line x x-axis, it is the horizontal number line

You can graph points on the coordinate plane. A point has two coordinates which form an ordered pair. The x coordinate tells how far to move left or right along the x- axis. (3, -4) The y coordinate tells how far to move up or down along the y-axis.

Example 1 What are the coordinates of point A? Move up from the x axis. The y coordinate is 4. What are the coordinates of point A? A The coordinates for point A are (2, 4). Start at the origin. Move 2 units to the right. The x coordinate is 2.

Example 2 B What are the coordinates of point B? Move 5 units left from the origin. The x coordinate is -5. What are the coordinates of point B? Move down from the x axis to point B. The y coordinate is -2. The coordinates for point B are (-5, -2). B

C D B F E A A (-7, 4) B (3, -3) C (3, 0) D (7, 1) E (0, -7) F (-6, -4) Practice Write the ordered pair for each point. A A (-7, 4) B (3, -3) C (3, 0) D (7, 1) E (0, -7) F (-6, -4) C D B F E

The coordinate plane is divided into four quadrants. Quadrant II Quadrant I Quadrant III Quadrant IV

Example 3 In which quadrant is point C located? C Quadrant III

Example 4 In which quadrant is point D located? Quadrant IV D

A B C D E II I III IV A D B C E Practice Identify the quadrant in which each point lies. A B C D E II I III IV A D B C E

Where is ordered pair F located? pair G located? (-7, 0) on x axis (0, 4) on y axis

Closure What are the signs for all of the x-coordinates and all of the y-coordinates of the ordered pairs in the second quadrant? x negatives, y positives