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1a.A line L1 passes through the points (3,3) and (5,7).Find the equation of L1 in the form Y=Mx+c where m and c are constants.

b.Another line L2 is perpendicular to L1 and passes through (-2,3).Find :
1.The equation of L2
2.The X-intercept of L2

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1 answer

  1. L1 has slope 2, so
    L1: y = 2x-3
    L2 has slope -1/2, so
    L2: y = -1/2 x + 2
    Now just find where L2 has y=0.

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