<PRE><B>Question 68252</B>
how can i know wheter the graph of the following equation is parallel, perpendicular, or neither. thank you. 
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If the slopes are the same, the lines are parallel.
If the product of the slopes is -1, the lines are perpendicular.
2x+3y=4
y=(-2/3)x+(4/3)
slope = -2/3
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3x+2y=6
y=(-3/2)x+3
slope = -3/2
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Slopes are not equal and their product is not -1 so the lines are 
neither parallel nor perpendicular.
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Cheers,
Stan H.
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