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← Calculating Slope - Visualizing Algebra

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Showing Revision 2 created 05/24/2016 by Udacity Robot.

  1. >> Well, it turns out it doesn't matter which one you call p1, or p2. I'm going
  2. to find the slope with this one as p1, and this one as p2. I'm going to label
  3. this point with x sub 1, y sub 1, and this point with x sub 2, y sub 2. Y sub 2
  4. is 3, and y sub 1 is 6, so I have 3 minus 6. X sub 2 is 7, and x sub 1 is 4, so
  5. I have 7 minus 4 for the run. I have negative 3 divided by 3 which makes
  6. negative 1, but let's see if this works the other way. I can label this point 2
  7. and this point 1. So this time y2 is 6 and y1 is 3 and for the x values, x2 is 4
  8. and x1 is 7. Here I have 3 divided by negative 3, and look at that, I still get
  9. negative 1.