document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=417350>Question 417350</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine whether the line through P1(1,-2) and P2(4,-3) is parallel to the line through Q1(4,3) and Q2(7,4) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #292174 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=292174\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> determine whether the line through P1(1,-2) and P2(4,-3) is parallel to the line through Q1(4,3) and Q2(7,4)\r<BR>\n" );
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document.write( "The slope of line passing through (x1,y1),(x2,y2) = (y2-y1)/(x2-x1)\r<BR>\n" );
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document.write( "P1(1,-2) and P2(4,-3)<BR>\n" );
document.write( "m= (-3-(-2))/(4-1)<BR>\n" );
document.write( "m=-1/3<BR>\n" );
document.write( "...<BR>\n" );
document.write( "line through Q1(4,3) and Q2(7,4)<BR>\n" );
document.write( "m=(4-3)/(7-4)<BR>\n" );
document.write( "m=1/3<BR>\n" );
document.write( "The slopes are different so they are not parallel </SPAN>\n" );
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