Hoag Ordered Pairs Lesson

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Students will be able to identify the parts of a coordinate grid and correctly graph an ordered pair on a grid.

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Hoag Ordered Pairs Lesson

  1. 1. Instructional Objectives<br /> By the end of today’s lesson you will be able to identify the parts of a coordinate grid and correctly graph an ordered pair on a grid.<br />
  2. 2. X- AXIS <br />A coordinate grid has two perpendicular lines, or axis, labeled like number lines.<br />The x-axis is the horizontal axis.<br />
  3. 3. Y-AXIS<br />The y-axis is the vertical axis.<br />
  4. 4. Origin<br />The point where the x-axis and y-axis intersect is called the origin.<br />
  5. 5. Ordered Pair <br />The numbers on a coordinate grid are used to locate points. These points are identified by an ordered pair of numbers.<br />A number that is on the x-axis is called an x-coordinate.<br />A number that is on the y-axis is called a y-coordinate.<br />Ordered pairs are written like this: (x-coordinate, y-coordinate).<br />The ordered pair for the origin is (0,0).<br />
  6. 6. Graphing an Ordered Pair<br />The order in which you write the ordered pair is important.<br />The x-coordinate must come first. This shows how far over (to the right) you have to move on the x-axis. In the example, you can see a move over to the right 2 marks.<br />The y-coordinate comes next. This number shows how far up you have to move on the y-axis. <br />
  7. 7. Plotting Points<br /> Soon you are going to plot and label points on an empty coordinate grid.<br />When you plot, you need to start at the point of origin and move overthe on the x-axis <br /> and move up from that point to mark your point<br />
  8. 8. Plotting Points<br />See the example for Point A = (6, 4) that has been plotted and labeled on the coordinate grid below.<br />You can see that since the x-coordinate is 6, you move over 6 spaces to the right. Since the y-coordinate is 4, you move up 4 spaces. Then, put a dot and a label of the point.<br />
  9. 9. Practice<br />Plot the following points and label them with the ordered pair next to the point.<br />(9,4)<br /> <br />(2,3)<br /> <br />(8,0)<br /> <br />(2,10)<br /> <br />(0,5)<br /> <br />(8,8)<br /> <br />(5,2)<br /> <br />

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