document.write( "Question 612457: Determine whether the graphs of the two equations are perpendicular.
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Algebra.Com's Answer #385516 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "Determine whether the graphs of the two equations are perpendicular.
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document.write( "Using the standard slope-intercept form for an equation of a line y = mx + b
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document.write( "  where m is the slope and b the y-intercept. 
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document.write( " y=x-9
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document.write( "7y=9-x OR y = x + 9/7
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document.write( "NO: slopes are NOT negative reciprocals of one another \n" );
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