Question 443081
Determine wheather the graphs of the equations are perpendicular.
6x-7y=8
6y-7x=5 
Are the graphs of the given equations perpendicular? 
No or Yes
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Check the slopes:
1st Eq: y = (6/7)x-(8/7)
slope = 6/7
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2nd Eq: y = (7/6)x+(5/6)
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Not perpendicular because the product of the 
slopes is not -1.
Cheers,
Stan H.