Introduction to coordinate geometry
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Introduction to coordinate geometry

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Introduction to coordinate geometry Presentation Transcript

  • 1. 09.28.10 ACT Opener
    1. 2.
    3.
    4.
  • 2. Introduction to coordinate geometry
    September 28, 2010
  • 3. Coordinates
    Any point on the plane can be named with 2 numbers, called coordinates
    x- coordinate
    1st number
    the distance from the origin along the x-axis
    y – coordinate
    The 2nd number
    the distance from the origin along the y-axis
    The pair is listed in alphabetical order
    (x, y)
    (a, b)
    Ordered Pair
  • 4. The Coordinate Grid
    y-axis
    First Quadrant
    Second Quadrant
    origin
    x-axis
    Third Quadrant
    Fourth Quadrant
  • 5. Points in All Quadrants
    (+ , +)
    (- , +)
    (- , -)
    (+ , -)
  • 6. Examples
    Plot each point on the coordinate grid
    (-3, 2)
    (-1, -3)
  • 7. Examples
    Give the coordinates and the quadrant of each point.
    A
    B
    A
    B
  • 8. Graph Linear Equations with a Table
    Graph y = 2x + 3
  • 9. Be careful with your grpahing
    Be Neat!
    Use Labels
    Use a straight edge
  • 10. Examples
    Graph 4x – 3y = 12
  • 11. Exit Slip
    Complete a table of solutions for the equation.
    Graph the solutions and draw a line through them.
    y = 7x - 5