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Math Help - just a question

  1. #1
    Junior Member allsmiles's Avatar
    Joined
    May 2010
    From
    Altlanta GA
    Posts
    53

    just a question

    Line A: y = 1
    2
    x + 2
    Line B: y =
    -1
    2
    x + 7
    Line C: y = -2x + 4
    Line D: y =
    1
    2
    x + 5
    4
    using these numbers can you solve to find the line that is perpendicular without graphing it?
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  2. #2
    Member oldguynewstudent's Avatar
    Joined
    Oct 2009
    From
    St. Louis Area
    Posts
    244
    Quote Originally Posted by allsmiles View Post
    Line A: y = 1
    2
    x + 2
    Line B: y = -1
    2
    x + 7
    Line C: y = -2x + 4
    Line D: y = 1
    2
    x + 5
    4

    using these numbers can you solve to find the line that is perpendicular without graphing it?
    You've written these lines in the slope intercept form, so perpendicular lines will have the negative reciprocal slope.
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