document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=225304>Question 225304</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tell whether the graphs of the pair of equations are parallel, perpendicular or neither. <BR>\n" );
document.write( "5 x + 9 y = 9 <BR>\n" );
document.write( "9 x - 5 y = 4 \r<BR>\n" );
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document.write( "I am struggling with these. Thank you for your help.\r<BR>\n" );
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document.write( "Emily </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #168146 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=168146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solving for y puts the equations into slope-intercept form<BR>\n" );
document.write( "___ if the slopes are the same, the graphs are parallel<BR>\n" );
document.write( "___ if the slopes are negative reciprocals, the graphs are perpendicular\r<BR>\n" );
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document.write( "5 x + 9 y = 9 ___ subtracting 5x ___ 9y = -5x + 9<BR>\n" );
document.write( "___ dividing by 9 ___ y = -5/9 x + 1\r<BR>\n" );
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document.write( "9 x - 5 y = 4 ___ subtracting 9x ___ -5y = -9x + 4<BR>\n" );
document.write( "___ dividing by -5 ___ y = 9/5 x - 4/5\r<BR>\n" );
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document.write( "the slopes are negative reciprocals so the graphs are perpendicular </SPAN>\n" );
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