document.write( "Question 1099622: Determine whether the graphs of the following equations are parallel or perpendicular. Explain. 3X-9Y= 9, 3Y=X +12, 2X- 6Y= 12 \n" ); document.write( "
Algebra.Com's Answer #714128 by josgarithmetic(39620)\"\" \"About 
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3X-9Y= 9,   3Y=X +12,   2X- 6Y= 12
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\n" ); document.write( "\n" ); document.write( "Basic Rule: slopes equal means lines parallel (unless the two lines are the same); slopes which are negative reciprocal of each other are perpendicular.\r
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\n" ); document.write( "\n" ); document.write( "Slopes of your lines in order given:
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1/3,   1/3,   and 1/3
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\n" ); document.write( "(Are any pair of your lines the same line?)
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