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write and equation of a line perpendicular to the line y=1/2x+10 and passes through (0,3)

  • geometry -

    since y=1/2 x+10 has slope 1/2, you want a line with slope -2.

    Now you have a point and a slope, so

    y-3 = -2(x-0)
    y = -2x+3

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