SOLUTION: When graphing how can I determine if two lines are perpendicular.

Algebra ->  Linear-equations -> SOLUTION: When graphing how can I determine if two lines are perpendicular.       Log On


   

Question 256465: When graphing how can I determine if two lines are perpendicular.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Another weakness of using graphs to solve. You can't tell by graphing.
You have to use formulas.