SOLUTION: Two points are given from each of two lines L1 and L2. Without graphing the points, determine if the lines are perpendicular, parallel, or neither. L1: (-4,-2) and (-6,-6)

Question 1133449: Two points are given from each of two lines L1 and L2. Without graphing the points, determine if the lines are perpendicular, parallel, or neither.
L1: (-4,-2) and (-6,-6)
L2: (-4,-4) and (0,-6)
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Find the slope of each line.
Call them m1 and m2.
If mi = m2, they're parallel.
If m1 = -1/m2, they're perpendicular.
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If neither of the above, they're neither.
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I swear I did not graph them.

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