document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=942015>Question 942015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Identify the lines that are perpendicular:\r<BR>\n" );
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document.write( "	Lines 1 and 3 are perpendicular.<BR>\n" );
document.write( "	Lines 2 and 4 are perpendicular.<BR>\n" );
document.write( "	Lines 1 and 3 are perpendicular, and Lines 2 and 4 are perpendicular.\r<BR>\n" );
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document.write( "OR<BR>\n" );
document.write( "	None of the lines are perpendicular. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #574236 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=574236\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "Lines 2 and 4 are perpendicular.\r<BR>\n" );
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document.write( "line 2  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%281%2F4%29x-1 ALIGN=MIDDLE  ALT=\"y=%281%2F4%29x-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > => slope <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F4%29 ALIGN=MIDDLE  ALT=\"%281%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and line 4\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-4%28x%2B1%29 ALIGN=MIDDLE  ALT=\"y=-4%28x%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > => slope <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4 ALIGN=MIDDLE  ALT=\"-4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F4%29 ALIGN=MIDDLE  ALT=\"%281%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > is negative reciprocal of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4 ALIGN=MIDDLE  ALT=\"-4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F4%29x-1%2C+-4%28x%2B1%29%29+ ALIGN=MIDDLE  ALT=\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F4%29x-1%2C+-4%28x%2B1%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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