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THE COORDINATE PLANE

THE COORDINATE PLANE. 1-10. VOCABULARY. Intersect – to cross or divide something Coordinate Plane – what is formed by the intersection of 2 number lines Axes – the 2 number lines of the Coordinate Plane. Axes…. The lines that intersect are called axes .

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THE COORDINATE PLANE

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  1. THE COORDINATE PLANE 1-10

  2. VOCABULARY • Intersect – to cross or divide something • Coordinate Plane – what is formed by the intersection of 2 number lines • Axes – the 2 number lines of the Coordinate Plane

  3. Axes… • The lines that intersect are called axes. • The horizontal number line is called the x-axis • The vertical number line is called the y-axis

  4. The 4 Quadrants • The x- and y- axes divide the Coordinate Plane into 4 Quadrants: y Quadrant I Quadrant II x 0 Quadrant III Quadrant IV Quadrants count counter-clockwise

  5. The Origin • 0 is the origin, or the starting point of the intersection. • When we work with the Coordinate Plane, we work with 2 number lines. y 3 2 1 x 0 -3 -2 -1 1 2 3 -1 -2 -3

  6. Ordered Pairs • An Ordered Pair gives the exact coordinates, or location, of one particular point. • Ordered Pairs are always written in this form: P: (x-coordinate, y-coordinate)

  7. Ordered Pair Example y • P: (-5, 4) 6 P: (-5, 4) 5 x-coordinate y-coordinate 4 3 Step 1 – You must go to the x-axis and find your x-coordinate 2 1 x 0 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 -1 -2 -3 Step 2 – You must go to the y-axis and find your y-coordinate -4 -5 -6 Step 3 – You must connect the 2 numbers you have. The intersection is your point.

  8. Helpful Hints… • Here’s some hints to use when figuring out what Quadrant your point will be found in. y II I (-, +) (+, +) x III IV (-, -) (+, -)

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