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7th Grade Math / Lesson 1: Coordinate Plane

COORDINATE PLANE

  What will we be learning today?

  • In this lesson, you will learn about the coordinate plane and plotting points.

    Vocabulary words are found in this purple color throughout the lesson.
            Remember to put these in your notebook.


Coordinate Plane
  • Take a look at this seating chart for a classroom.


    If John is in seat (3,3) and Mark is in (4,1) what seat is Mary in? What about Pat?


Coordinate Plane


    If John is in seat (3,3) and Mark is in (4,1) what seat is Mary in? What about Pat?

    Mary is in seat (1,2) and Pat is in seat (4,3).

  • Is the seat (2,1) the same as seat (1,2)?


Coordinate Plane


  • Is the seat (2,1) the same as seat (1,2)?
  • They are not the same. Matt is in the seat (2,1) and Mary is in the seat (1,2).


Coordinate Plane
  • Organizing on this type of number grid is called a coordinate plane.

    A coordinate plane is a two-dimensional grid, such as the seating chart. It is made up of 2 number lines. One that runs horizontally (left to right) which is called the x-axis. And one that runs vertically (up and down) which is called the y-axis. The location of items on the grid (coordinate plane) are given by two numbers. One to tell you the left/right location and one to tell you the up/down location. Like the location (3,1) on the seating chart. This is where Gail is sitting. 3 to the right and up 1.


Coordinate Plane
  • Locations such as the ones from the seating chart are called ordered pairs. Ordered pairs are a pair of numbers that describes the place of something on a coordinate plane. The order of these numbers is important. Look at the seating chart. If you want Tony you need to be sure that you use (3,2) and not (2,3).
  • The following ordered pairs are graphed on the coordinate plane.


Coordinate Plane
  • The x and the y-axes are number lines. Number lines range from lowest value to highest value. Where the two number lines intersect (cross) is called the origin. The location of the origin is (0,0). It is located directly in the center of both number lines.
  • The first number in the ordered pair is telling you how far to move along the x-axis. The second number is telling you how far to move along the y-axis.


Coordinate Plane
  • Graph and label the following ordered pairs on the coordinate plane.

    A. (5,1)
    B. (4,2)
    C. (1,6)
    D. (0,4)
    E. (-2,-3)


Coordinate Plane
  • Graph and label the following ordered pairs on the coordinate plane.

    Start at the origin
    A. (5,1) right 5, up 1
    B. (4,2) right 4, up 2
    C. (1,6) right 1, up 6
    D. (0,4) right 0, up 4
    E. (-2,-3) left 2, down 3


Coordinate Plane


  • Can you identify the values of an ordered pair?
  • Can you graph an ordered pair on a coordinate plane?
  • Be sure to go back to your classroom to get any homework assignments or other activities you need to attend to.