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Please answer this, I really need help ):

Please answer this, I really need help ):-example-1
User Snowbases
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Answer is (b)
The lines are perpendicular
y = 1/3 x has slope = 1/3
y = -3x +1 has slope = -3

perpendicular line, slope is opposite and reciprocal. (one is 1/3 and other is -3)

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