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October 23, 2014

October 23, 2014

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

(i)Find the equation of the perpendicular bisector of AB

(ii)Find the slope of BC

- maths -
**Henry**, Saturday, March 3, 2012 at 4:33pmA(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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