Question 1069322
Compare the slopes,
{{{m[1]=-2}}}
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{{{y=-(-1/2)x-1}}}
{{{m[2]=-1/2}}}
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Parallel lines have identical slopes.
Perpendicular lines have slopes that are negative reciprocals.
{{{m[1]m[2]=-1}}}
In this case,
{{{m[1]m[2]=-2(-1/2)=1}}}
So these lines are neither parallel nor perpendicular.
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*[illustration der10.JPG].