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The Coordinate Plane By: Christine Berg Edited By:VTHamilton

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

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**The perpendicular number lines form a grid on the plane**

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

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**X-axis The horizontal number line Positive to the right**

Negative to the left

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Y-axis The vertical number line Positive upward Negative downward

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

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

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

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II I IV III

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**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

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

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Plotting a Point Step 1: Begin at the Origin

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

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**Move up or down to the value of y**

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

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**Draw a dot and label the point**

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

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**In Your Own Words What is a coordinate plane? Define origin**

How do you plot a point?

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