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Posted by on Friday, March 2, 2012 at 2:53am.

Given the points A(1,7),B(7,5) and C(0,-2).
(i)Find the equation of the perpendicular bisector of AB
(ii)Find the slope of BC

  • maths - , Saturday, March 3, 2012 at 4:33pm

    A(1,7), M(x,y), B(7,5), C(0,-2).

    1. x = (1+7) / 2 = 4.
    y = (7+5) / 2 = 6.

    m1 = (5-7) / (7-1) = -1/3.

    m2 = -(-3/1) = 3. = Negative reciprocal of mi.

    Y = mx + b.
    3*4 + b = 6.
    b = -6.

    Eq: Y = 3x - 6.

    2. m = (-2-5) / (0-7) = 1.

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