Algebra

Find an equation of a line perpendicular to the given line and contains the given point. Write the equation in slope-intercept form.

a. line 3x+y=5, point (-1,2)

b. line y=3x+1, point (6,1)

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  1. do like the other one, but use the perpendicular slope.

    3x+y=5 has slope -3
    so, the perpendicular line has slope 1/3
    The new line is thus
    y-2 = 1/3 (x+1)
    now rearrange to slope-intercept form

    do the other one in like wise.

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    posted by Steve

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