Introduction to coordinate geometry

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Introduction to coordinate geometry

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

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