SOLUTION: Are lines L1 through (-2,1) and (0,3) and L2 through points (3,2) and (5,0) perpendicular?

Algebra ->  Linear-equations -> SOLUTION: Are lines L1 through (-2,1) and (0,3) and L2 through points (3,2) and (5,0) perpendicular?      Log On


   

Question 95787: Are lines L1 through (-2,1) and (0,3) and L2 through points (3,2) and (5,0) perpendicular?
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
L1; m = %28y2-y1%29%2F%28x2-x1%29
m = %283-1%29%2F%280+-+%28-2%29%29
m = 2%2F2
L2; m = 0-2%29%2F%285-3%29
m = -2%2F2
Yes they are perpendicular, lines are perpendicular if there slopes are negative reciprocals.
:)