The Coordinate Plane By: Christine Berg Edited By:VTHamilton

Coordinate Plane Definition The plane formed when 2 perpendicular number lines intersect at their zero points

The perpendicular number lines form a grid on the plane Coordinate Plane The perpendicular number lines form a grid on the plane

X-axis The horizontal number line Positive to the right Negative to the left

Y-axis The vertical number line Positive upward Negative downward

Where the x and y axes intersect at their zero points Origin Where the x and y axes intersect at their zero points

Quadrants The x and y axes divide the coordinate plane into 4 parts called quadrants

II I IV III

A pair of numbers (x , y) assigned to a point on the coordinate plane Ordered Pair A pair of numbers (x , y) assigned to a point on the coordinate plane

Ordered Pair X-coordinate (x , y) Y-coordinate

Plotting a Point Step 1: Begin at the Origin

Plotting a Point Step 2: Locate x on the x-axis

Move up or down to the value of y Plotting a Point Step 3: Move up or down to the value of y

Draw a dot and label the point Plotting a Point Step 4: Draw a dot and label the point

In Your Own Words What is a coordinate plane? Define origin How do you plot a point?