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secondary 3 | A Maths

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This is hard!! >.<

2y = x + 7

y = 0.5x + 3.5

The gradient of the new line is also 0.5.

Bisects the line joining (3, 1) and (1, -5) means that this new line that we are finding cuts the midpoint of this other line. Midpoint of this other line is (2, -2) (average values of x and y)

So, y = 0.5x + c

-2 = 2 (0.5) + c

c = -3

So y = 0.5x - 3

2y = x - 6

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