A) \[3x+y+7=0\] and \[x+3y+9=0\]
B) \[3x-y-7=0\] and \[x+3y-9=0\]
C) \[x+3y-7=0\] and \[x+3y-9=0\]
D) None of these
Correct Answer: B
Solution :
Slope of given line is \[\frac{1}{2}.\] Thus \[\tan {{45}^{o}}=\pm \frac{m-\frac{1}{2}}{1+m.\frac{1}{2}}\] Þ \[m=\pm 3\]. Hence option (b) is correct.You need to login to perform this action.
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