SOLUTION: -2/3y+x=9 and 6x+4y=7 are they perpendicular?

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Question 347626: -2/3y+x=9 and 6x+4y=7 are they perpendicular?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
First convert both to slope-intercept form, y=mx%2Bb
-%282%2F3%29y%2Bx=9
y-%283%2F2%29x=-6
y=%283%2F2%29x-27%2F2
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6x%2B4y=7
4y=-6x%2B7
y=-%283%2F2%29x%2B7%2F4
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Perpendicular lines have slopes that are negative reciprocals,
m1%2Am2=-1
%283%2F2%29%2A%28-%283%2F2%29%29=-1
-9%2F4=-1
No, the lines are not perpendicular.
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