The equation of the line passing through the point (1,2) and perpendic – InterviewSolution

InterviewSolution

1.

The equation of the line passing through the point (1,2) and perpendicular to the line x + y + 1 = 0 is(A) y – x + 1 = 0 (B) y – x – 1 = 0(C) y – x + 2 = 0 (D) y – x – 2 = 0

Answer»

Answer is (B)

Slope of the given line +1=0 is-1.

So, slope of line perpendicular to above line is 1.

Line passes through the point (1,2).

Therefore, equation of the required linens:

y-2 = 1(x- 1) => y-x-1=0.

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