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Homework Help: Determine coordinates of reflection given equation

  1. Mar 17, 2012 #1
    1. The problem statement, all variables and given/known data
    Find the coordinates of reflection of the point P (4,8) in the line y=-3/2 x + 14


    2. Relevant equations

    y= -3/2x + 14

    3. The attempt at a solution
    find a point on the line?
     
  2. jcsd
  3. Mar 17, 2012 #2

    HallsofIvy

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    Science Advisor

    Can you find the equation of the line through (4, 8), perpendicular to that line? Do you see why you want that?
     
  4. Mar 17, 2012 #3
    would you have to sub in the point 4,8 in the equation and find the dot product?
     
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