how do i determine whether 2 lines are parallel, perpendicular, or niether?

Question

anonymous · Answer

perpendicular lines intersect

anonymous · Answer

parallel lines never meet

anonymous · Answer

i need to know that from the points (-3,-2) (9,1) (3,6) and (5,-2)

ashleyisakitty · Answer

Graph them on a graphing calculator, or WolframAlpha, then follow the rules that @dmart180 explained.

anonymous · Answer

ok

ashleyisakitty · Answer

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ashleyisakitty · Answer

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anonymous · Answer

don't listen to @Ashleyisakitty, drawing are not been used to determine if two lines are perpendicular or parallel because they lack serious rigorousity

anonymous · Answer

what u should do for parallelism test is to find if the a value in their y=ax+b is the same

ashleyisakitty · Answer

Its a general example of what to look for, you can also follow the equation.

arabpride · Answer

~>If two equations have the SAME SLOPE, which is represented by the "m" variable in the form shown above, then these two equations are PARALLEL 
[ex: y = 3x + 7 is parallel to y = 3x + 1]

~>If two equations have an OPPOSITE RECIPROCAL SLOPE, then they are PERPENDICULAR to one another 
[ex: y = -1/2x + 3 is perpendicular to y = 2x + 9]

~>If two equations have neither of these relationships, then your answer would be "neither".

Make sense? :3