If (4,-3) is a point on the line AB and slope of the line is (-2), write the equation of the line AB.

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#### Solution

(4, -3) ≡ (x_{1}, y_{1}) is a point on the line AB and slope = m = -2

Equation of line AB in point slope form is

y - y_{1} = m(x - x_{1})

y - (-3) = -2(x - 4)

y + 3 = -2x + 8

2x + y - 5 = 0

Concept: General Equation of a Line

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