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Mathematics

The equation of a line passing through two points A(x1, y1) and B(x2, y2) is given by:

  1. (x – x1) = y2y1x2x1\dfrac{y2 - y1}{x2 - x1} (y – y1)

  2. (y – y1) = x2x1y2y1\dfrac{x2 - x1}{y2 - y1} (x – x1)

  3. (y – y1) = y2y1x2x1\dfrac{y2 - y1}{x2 - x1} (x – x1)

  4. (y – y1) = y1y2x2x1\dfrac{y1 - y2}{x2 - x1} (x – x1)

Straight Line Eq

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Answer

By two-point formula,

Equation of line :

(y – y1) = y2y1x2x1\dfrac{y2 - y1}{x2 - x1} (x – x1)

Hence, option 3 is the correct option.

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