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Coordinate Graphs

Coordinate Graphs. Coordinate Graphs. Objectives. To understand the Cartesian Coordinate System. To plot ordered pairs (points) on the Cartesian Coordinate System. Coordinate Graphs. The Cartesian coordinate system was developed by a French mathematician, Rene Descartes.

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Coordinate Graphs

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  1. Coordinate Graphs Mrs. Bubello

  2. Coordinate Graphs Objectives • To understand the Cartesian Coordinate System. • To plot ordered pairs (points) on the Cartesian Coordinate System. Mrs. Bubello

  3. Coordinate Graphs The Cartesian coordinate system was developed by a French mathematician, Rene Descartes. • Descartes lay in bed sick and saw a fly buzzing around on the ceiling. He realized that he could describe the position of the fly using the square ceiling tiles. After this experience he developed the coordinate plane. Mrs. Bubello

  4. Coordinate Graphs A coordinate graph is made up of two perpendicular number lines, called “axes”. The horizontal number line is the x-axis and the vertical number line is the y-axis. Mrs. Bubello

  5. Coordinate Graphs The two axes divide the plane into four sections called “quadrants”. The quadrants are labeled with Roman Numerals, starting in the upper right corner and going counterclockwise. Mrs. Bubello

  6. Coordinate Graphs Every point in the plane can be described by an ordered pair of values called coordinates. We refer to these ordered pairs as (x, y), (x-coordinate, y-coordinate). Mrs. Bubello

  7. Coordinate Graphs Rules for Plotting Ordered Pairs Always begin at the origin, the intersection of the two axes. The x-coordinate, is the first number of the pair and gives the direction of left or right along the x-axis or the horizontal number line. The y-coordinate, is the second number of the pair and gives the direction of up or down along the y-axis or the vertical number line. Mrs. Bubello

  8. Coordinate Graphs Look at the coordinates at the left. Can you name them? Purple (0,0) Red (2,3) Blue (-3,1) Green (-2.5,-2.5) Mrs. Bubello

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