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The slope of the line parallel to 3x – by + 7 = 0 is 3 then b = ……………….. A) 3 B) 4C) 1 D) 5 |
Answer» Correct option is (C) 1 Given line is 3x – by + 7 = 0 \(\Rightarrow by=3x+7\) \(\Rightarrow y=\frac3bx+\frac7b\) \(\therefore\) Slope of given line is \(\frac3b\) \(\therefore\) Slope of line parallel to given line is \(\frac3b.\) But given that the slope of line parallel to \(3x-by+7=0\) is 3. \(\therefore\) \(\frac3b\) = 3 \(\Rightarrow b=\frac33=1\) Correct option is C) 1 |
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