COORDINATE PLANECOORDINATE PLANE

Math 7Math 7

What is the coordinate plane?What is the coordinate plane?

The coordinate plane is formed when The coordinate plane is formed when a horizontal number line a horizontal number line (x-axis)(x-axis) and a vertical number line and a vertical number line (y-axis)(y-axis) are joined in the middle.are joined in the middle.

This middle point is called the This middle point is called the originorigin..

What does it look like?What does it look like?

QuadrantsQuadrants

Drawing the axes separates the Drawing the axes separates the coordinate plane into coordinate plane into quadrantsquadrants..

The first quadrant (I) is located in the The first quadrant (I) is located in the upper right. Then you go counter-upper right. Then you go counter-clockwise to quadrant II, III, and IV. clockwise to quadrant II, III, and IV.

Label the Quadrants and AxesLabel the Quadrants and Axes

Ordered PairsOrdered Pairs

An ordered pair is a fancy name for a An ordered pair is a fancy name for a “point”“point”

(x,y) is the format for an ordered pair(x,y) is the format for an ordered pair The x-coordinate is listed first and The x-coordinate is listed first and

the y-coordinate is secondthe y-coordinate is second

Graphing Ordered PairsGraphing Ordered Pairs

To graph ordered pairs, you go left or To graph ordered pairs, you go left or right from the origin (on the x-axis) right from the origin (on the x-axis) to the x-coordinate firstto the x-coordinate first

From the x-coordinate, you go up or From the x-coordinate, you go up or down to the y-coordinatedown to the y-coordinate

Place the point here and label it with Place the point here and label it with the ordered pair.the ordered pair.

Plot the points, label, and tell which Plot the points, label, and tell which quadrant they are in. quadrant they are in.

(3,2)(3,2) (5,1)(5,1) (-3,4)(-3,4) (-7,3)(-7,3) (7,-5)(7,-5) (-4,-3)(-4,-3) (3,-2)(3,-2) (-6,-4)(-6,-4) (6,3)(6,3)

Points that don’t lie in a quadrantPoints that don’t lie in a quadrant

(2,0)(2,0) (-5,0)(-5,0) (-7,0)(-7,0) (6,0)(6,0) (0,3)(0,3) (0,-4)(0,-4) (0,-7)(0,-7) (0,5)(0,5) If they don’t lie in a If they don’t lie in a

quadrant, where do quadrant, where do they lie?they lie?

HomeworkHomework

Graphing WorksheetGraphing Worksheet