1.

The slope of the line perpendicular to the line 2x + y + 4 = 0 is A) -2 B) 2 C) \(\cfrac{1}2\)D)\(-\cfrac{1}2\)

Answer»

Correct option is (C) \(\frac{1}{2}\)

Given line is 2x + y + 4 = 0

\(\Rightarrow y=-2x-4\)

By comparing with y = mx+c, we obtain

\(m=-2\)

Hence, slope of the line 2x + y + 4 = 0 is m = -2.

\(\therefore\) Slope of line perpendicular to line 2x+y+4 = 0

\(=\frac{-1}{\text{slope of line 2x+y+4}}\)

\(=\frac{-1}{-2}=\frac12\)

Hence, the slope of the line perpendicular to the line 2x+y+4 = 0 is \(\frac{1}{2}.\)

Correct option is D)\(\cfrac{1}2\)



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