document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1126444>Question 1126444</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Lines l1 and l2 past through the given points. Determine if l1 and l2 are parallel, perpendicular, or neither. \r<BR>\n" );
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document.write( "l1: (1,3) and (0,0)<BR>\n" );
document.write( "l2: (0,7) and (-2,1) \r<BR>\n" );
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document.write( "How would you solve in order to compare? Thank you.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #742749 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=742749\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=\"black\" face=\"times\" size=\"3\">Use the slope formula to find the slope of the line through (1,3) and (0,0)\r<BR>\n" );
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document.write( "(x1,y1) = (1,3) and (x2,y2) = (0,0)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+3 ALIGN=MIDDLE  ALT=\"m+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The slope of line L1 is 3\r<BR>\n" );
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document.write( "Repeat these steps to find the slope of line L2\r<BR>\n" );
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document.write( "(x1,y1) = (0,7) and (x2,y2) = (-2,1)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+3 ALIGN=MIDDLE  ALT=\"m+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The slope of line L1 is also 3\r<BR>\n" );
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document.write( "Both lines L1 and L2 have the same slope 3, so the two lines are parallel as this graph shows below<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" src=\"https://i.imgur.com/X9dg5ll.png\"><BR>\n" );
document.write( "These two parallel lines will never intersect.</font> </SPAN>\n" );
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