Which of the following pairs of lines are perpendicular? Select all that apply.
$ y=\frac{2}{3} x+4 $ and $ y=\frac{2}{3} x-8 $
$ y=\frac{2}{3} x-8 $ and $ y=-\frac{3}{2} x-8 $
$ y=x+2 $ and $ y=-x+3 $
$ y=3 x+2 $ and $ y=3 x-2 $
$ y=3 $ and $ x=4 $
$ y=\frac{4}{5} x-8 $ and $ y=-\frac{5}{4} x+3 $

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AIR MATH homework app,
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