SOLUTION: I need to determine whether the graphs of the equation are perpendicular. I believe that they are but I want to make sure. Thank you 8x-5y=7 8y-5x=5

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons  -> Linear Equations Lesson -> SOLUTION: I need to determine whether the graphs of the equation are perpendicular. I believe that they are but I want to make sure. Thank you 8x-5y=7 8y-5x=5      Log On


   

Question 389510: I need to determine whether the graphs of the equation are perpendicular. I believe that they are but I want to make sure. Thank you
8x-5y=7
8y-5x=5
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The slope of the top equation is 8/5, while the slope of the bottom equation is 5/8. They're not perpendicular because their slopes are not negative reciprocals of each other.