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Coordinate Geometry by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition Grid – A pattern of horizontal and vertical lines, usually forming squares. Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition Coordinate grid – a grid used to locate a point by its distances from 2 intersecting straight lines. A What are the coordinates for the house? B C D E 1 2 3 4 5 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition x axis – a horizontal number line on a coordinate grid. x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Hint x is the shortest and likes to lie down horizontally. x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition y axis – a vertical number line on a coordinate grid. 6 y 5 4 3 2 1 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Hint y is the tallest and stands upright or vertically. 6 y 5 4 3 2 1 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Definition Coordinates – an ordered pair of numbers that give the location of a point on a grid. (3, 4) 6 5 (3,4) 4 3 2 1 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Hint The first number is always the x or first letter in the alphabet. The second number is always the y the second letter in the alphabet. 6 5 (3,4) 4 3 2 1 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**How to Plot Ordered Pairs**

Step 1 – Always find the x value first, moving horizontally either right (positive) or left (negative). (2, 3) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**How to Plot Ordered Pairs**

Step 2 – Starting from your new position find the y value by moving vertically either up (positive) or down (negative). 6 (2, 3) 5 4 y (2,3) 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**How to Find Ordered Pairs**

Step 1 – Find how far over horizontally the point is by counting to the right (positive) or the left (negative). (5, ) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**How to Find Ordered Pairs**

Step 2 – Now count how far vertically the point is by counting up (positive) or down (negative). (5,4) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**What is the ordered pair?**

(3,5) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**What is the ordered pair?**

(2,6) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**What is the ordered pair?**

(4,0) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**What is the ordered pair?**

(0,5) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**What is the ordered pair?**

(1,1) 6 5 4 y 3 2 1 x 1 2 3 4 5 6 Copyright © 2000 by Monica Yuskaitis

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**Copyright © 2000 by Monica Yuskaitis**

Credits Clipart from “Microsoft Clip Gallery” located on the Internet at clipgallerylive/default.asp Copyright © 2000 by Monica Yuskaitis

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