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JEE Main & Advanced Mathematics Straight Line Question Bank Slope of line, Equation of line in different forms

  • question_answer
    The equation of the straight line which is perpendicular to \[y=x\] and passes through (3, 2) is            [MP PET 2002]

    A)            \[x-y=5\]                                  

    B)            \[x+y=5\]

    C)            \[x+y=1\]                                

    D)            \[x-y=1\]

    Correct Answer: B

    Solution :

               \[\because \] Slope of given line \[y=x\] is 1                    \[\therefore \] Slope of required line \[=-1\]                    Thus, the equation of required line                    \[y-2=-1(x-3)\] Þ \[x+y=5\].


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