Question 174045
Determine which of the following line, if any, are parallel or perpendicular.
Line a: 6x+2y=5 
y = -3x + (52)
slope = -3
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Line b: y=1/3x-4 
slope = 1/3
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Line c: y=-3x+5
slope = -3
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lines a and b are perpendicular because the product of their 
slopes is -1
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lines b and c are perpendicular for the same reason
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lines a and c are parallel because their slopes are equal.
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Cheers,
Stan H.