The Coordinate Plane

Vocabulary Words Axes - two perpendicular number lines used for locating points Origin – the intersection of the two axes Y-axis – the vertical number line X-axis – the horizontal number line

Y-axis X-axis The four quadrants of the coordinate plane. Quadrant I Quadrant II Quadrant IV Quadrant III

Y-axis X-axis Signs of the quadrants. (+,+ ) (+,- ) (-,- ) (-,+ )

The Ordered Pair (5,10) X- coordinate Y- coordinate

Y-axis X-axis The Origin Point Origin Point (0,0)

Always start at the origin to plot a point.

Y-axis X-axis Direction of Movement for the X-Coordinate If the x- coordinate is positive move this way If the x- coordinate is negative move this way

Y-axis X-axis Direction of movement for the Y-coordinate If the y - coordinate is positive move this way If the y - coordinate is negative move this way

Y-axis X-axis Name the given point. (1,3) (-5,-1) (-2,1) (4,0)

Y-axis X-axis (4,4) (-3,-1) First move out on the X-axis Next move on the Y- axis How To Plot a Point on the Coordinate Plane

1.(8,–7) 2.(4,0) 3.(–4,–5) 4.(0,–9) 5.(7,12) Plot each point and describe how to get to the point from the origin. From the origin, move to the right 8 units, then down 7 units. From the origin, move to the right 4 units, then stop (Stay on the x-axis.). From the origin, move to the left 4 units, then down 5 units. From the origin, don’t move to the right or left (stay on the y-axis), then move down 9 units. From the origin, move to the right 7 units, then up 12 units.