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secondary 3 | A Maths
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Shan Kuek
Shan Kuek

secondary 3 chevron_right A Maths chevron_right Singapore

This is hard!! >.<

Date Posted: 5 months ago
Views: 32
Eric Nicholas K
Eric Nicholas K
5 months ago
2y - x = 7
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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Eric Nicholas K
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The coordinate geometry in A Maths is just a slightly more advanced version of the coordinate geometry in E Maths.