Question 278167
find the slope of a line perpendicular to the graph of this equations 
y=2x
Given line has slope = 2 ; perp line must have slope (-1/2)
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y=-x/5-7
Given line has slope = -1/5 ; perp line must have slope 5
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y=-8
Given line has slope = 0 ; perp line must have slope = "undefined"
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Cheers,
Stan H.