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Mathematics

The equation of the line passing through the points A(4, 3) and B(–2, 6) is :

  1. x + 2y – 10 = 0

  2. x – 2y – 6 = 0

  3. x – 3y + 8 = 0

  4. x + 2y – 6 = 0

Straight Line Eq

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Answer

We know that,

m=y2y1x2x1mAB=6324=36=12.m = \dfrac{y2 - y1}{x2 - x1} \\[1em] m_{AB} = \dfrac{6 - 3}{-2 - 4} \\[1em] = \dfrac{3}{-6} \\[1em] = -\dfrac{1}{2}.

By point-slope form :

⇒ y - y1 = m(x - x1)

⇒ y - 3 = 12-\dfrac{1}{2} (x - 4)

⇒ 2(y - 3) = -1(x - 4)

⇒ 2y - 6 = -x + 4

⇒ x + 2y - 6 - 4 = 0

⇒ x + 2y - 10 = 0.

Hence, option 1 is the correct option.

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