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AP EAMCET20227 Jul 2022Morning ShiftMathematicsStraight LinesActual

The straight line passing through (0,0) and the foot of perpendicular from (2,4) onto x +y-1=0

Options

  1. Ay=-3 x
  2. By=3 x
  3. Cy= 1 3 x
  4. Dy= -1 3 x

Correct answer

A. y=-3 x

Step-by-step solution

h-2 1 = k-4 1 =- (2+4-1) 1^2+1^2 aligned & h=2- 5 2 and k=4- 5 2 & h=- 1 2 and k= 3 2 aligned Equation of line passing through (0,0) and (- 1 2 , 3 2 ) y= ( 3 2 -0 - 1 2 -0 ) x , i.e. y=-3 x

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