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Coordinate Planes

Coordinate Planes. Locating, Plotting & Reading Points on a Grid. What is a Coordinate Plane?. A plane formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis .

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Coordinate Planes

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  1. Coordinate Planes Locating, Plotting & Reading Points on a Grid

  2. What is a Coordinate Plane? A plane formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis. Plano formadopor la intersección de una recta numérica horizontal llamadaeje x (x-axis) y una recta numérica vertical llamadaeje y (y-axis). 5 4 3 2 1 1 2 3 4 5 0 1 2 3 4 5 -5 -4 -3 -2 -1 -1 -2 -3 -4 -5

  3. Purpose of the Coordinate Plane Location! Location! Location! We use coordinate planes to find exact locations!

  4. Real World Application One

  5. Real World Application Two

  6. Real World Application Three

  7. Parts of a Coordinate Plane X-Axis Y-Axis Origin Quadrant

  8. How to Use a Coordinate Plane A Coordinate Pair is needed! (x, y) A coordinate pair tells the exact location on the coordinate plane. The xnumberon the X-axis goes in the x place. The ynumberon the X-axis goes in the yplace. *Mathematicians use the x-axis first.

  9. Read Points(Figure out the Coordinate Pair) 1) Start at the origin. 2) Count the lines left or right toward the point. The number of lines you count goes into the x place of the coordinate pair. (x, y) becomes (2, y) 3) Now count the lines up or down toward the point. However many lines you count goes into the y place of the coordinate pair. (2, y) becomes (2, 3)

  10. Find Points In which quadrant is A? is B? is C? is D? Which point is (4, -5)? 1) Start at the origin. 2) Look at the first number and count that many lines from the origin left or right. (Right if it’s a positive number; Left if it’s a negative number) 3) Look at the second number and count that many lines from where you were up or down. (Up if it’s a positive number; Down if it’s a negative number) It’s Point C! B A D C

  11. Plot Points Plot (-2, 3) Start at the origin. -2 is in the x place, so find -2 on the x-axis. (count the lines on the x-axis from zero) 3 is in the y place, so find 3 on the y-axis. (count the lines on the y-axis from zero)

  12. Practice! • Read: At what point is the Church located? • Read: At what point is the Forest located? • Find: What is located at (-5, -2)? • Find: What is located at (4, -4)? • Plot: (2, -2) • Plot: (-4, 3)

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