algebra

find the equation of the perpendicular line to y=1/2x+4 and passing through the point (1,-2)

PLEASE HELP :)

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  1. Then the new equation must be
    y = -2x + b , remember slopes must be opposite reciprocals for perpendicular lines

    sub in the point (1,-2)
    -2 = -2(1) + b
    b = 0

    so y = -2x

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