Match each pair of points to the equation of the line that is parallel to the line passing through the points. tiles b(5, 2) and c(7, -5) y = -0.5x − 3 d(11, 6) and e(5, 9) y = -3.5x − 15 f(-7, 12) and g(3, -8) y = 5x + 19 h(4, 4) and i(8, 9) y = 1.25x + 4 j(7, 2) and k(-9, 8) l(5, -7) and m(4, -12)

If we identify the lines by ...
  1. y = -0.5x -3
  2. y = -3.5x -15
  3. y = 5x +19
  4. y = 1.25x +4

Then the matches are ...
  BC - 2
  DE - 1
  FG - none
  HI - 4
  JK - none
  LM - 3

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Whenever there is a lot of repetitive math to do, I usually find it easier to let a calculator or spreadsheet do it. Here, the graphing calculator is computing the slope between the points. The slopes of parallel lines are the same.

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