document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199013>Question 1199013</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine whether the graphs of each pair of lines are parallel(PL), perpendicular (PR), or neither (N).\r<BR>\n" );
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document.write( "1. y+5=-x<BR>\n" );
document.write( "   x-y= 2\r<BR>\n" );
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document.write( "2. y-x= -3<BR>\n" );
document.write( "   x+4=  y\r<BR>\n" );
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document.write( "3. 5x-y=8<BR>\n" );
document.write( "   5y=-x+3\r<BR>\n" );
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document.write( "4. 2y=3x+12<BR>\n" );
document.write( "   3y=2x-5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #832705 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=832705\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "I'll do problem 1 to get you started. <BR>\n" );
document.write( "Please post one problem at a time in the future.\r<BR>\n" );
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document.write( "Solve each equation for y.<BR>\n" );
document.write( "y+5 = -x<BR>\n" );
document.write( "y = -x+5<BR>\n" );
document.write( "Compare this to y = mx+b to find the slope is m = -1 and y-intercept is 5.\r<BR>\n" );
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document.write( "Repeat for the other equation<BR>\n" );
document.write( "x-y = 2<BR>\n" );
document.write( "x = 2+y<BR>\n" );
document.write( "x-2 = y<BR>\n" );
document.write( "y = x-2<BR>\n" );
document.write( "y = 1x-2<BR>\n" );
document.write( "This equation has a slope of m = 1\r<BR>\n" );
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document.write( "Recap:<BR>\n" );
document.write( "y = -x+5 has a slope of -1<BR>\n" );
document.write( "y = x-2 has a slope of 1\r<BR>\n" );
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document.write( "These two lines are not parallel because the slopes are different. <BR>\n" );
document.write( "Parallel lines must have equal slopes.\r<BR>\n" );
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document.write( "The lines are <u><font color=red>perpendicular</font></u> because their slopes multiply to -1<BR>\n" );
document.write( "(slope1)*(slope2) = -1*(1) = -1<BR>\n" );
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