document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=719614>Question 719614</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine whether the lines through the given pairs of points are parallel. A (2, - 3), B (- 2, - 11) and C (1, 2), D (- 1, 6) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441424 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=441424\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Determine whether the lines through the given pairs of points are parallel. A (2, - 3), B (- 2, - 11) and C (1, 2), D (- 1, 6)<BR>\n" );
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document.write( "Find the slopes.  If, and only if, the slopes are equal, they're parallel.<BR>\n" );
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document.write( "For AB:  A (2,- 3), B (- 2,- 11)<BR>\n" );
document.write( "slope m = diffy/diffx<BR>\n" );
document.write( "m = -8/(-4) = 2<BR>\n" );
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document.write( "Find the slope of CD, compare them.<BR>\n" );
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document.write( "PS  Don't put a space after the comma in the points.<BR>\n" );
document.write( "(1,2) not (1, 2)<BR>\n" );
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