document.write( "Question 416839: Determine whether the graps of the equations are parallel, perpendicular, or neither 2x+3y=7 and -9x+6y=8 \n" ); document.write( "

Algebra.Com's Answer #291931 by ewatrrr(24785) $\"\"$ $\"About$

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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( " 2x+3y=7   OR  y= (-2/3)x + 7/3    m = (-2/3)  
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document.write( "-9x+6y=8  OR  y= (9/6)x + 8/6 OR  y= (3/2)x + 8/6  m =3/2
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document.write( "Lines are perpendcular: (negative reciprocals, that is:  (-2/3)*3/2 = -1
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