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    Gumbranch's Avatar
    Gumbranch Posts: 1, Reputation: 1
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    #1

    Mar 16, 2007, 01:13 PM
    Writing equations of perpendicular lines
    How do I write an equation of a line that is perpendicular to y=-3 + 5 and passes through
    (4,3)?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 16, 2007, 01:26 PM
    I reckon you mean y=-3x+5? If so, the slope of this line is -3. The slope of the perpendicular is the negative reciprocal of the aforementioned slope.

    Then use your given points, (4, 3), to find the equation of said line.
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