document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=14452>Question 14452</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this problem. I can't figure it out. Here is the problem:\r<BR>\n" );
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document.write( "The line through points (a,b) and (c,d) has slope m = _________,<BR>\n" );
document.write( "provided a is not equal to c.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #7237 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=7237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You will usually see the formula for the slope of a line, when you are given two points, written as:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28y2+-+y1%29%2F%28x2+-+x1%29 ALIGN=MIDDLE  ALT=\"m+=+%28y2+-+y1%29%2F%28x2+-+x1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Where the coordinates of the two points are: (x1, y1) and (x2, y2)\r<BR>\n" );
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document.write( "In this problem, the two given points have the coordinates: (a, b) and (c, d), so the slope formula would look like:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28d+-+b%29%2F%28c+-+a%29 ALIGN=MIDDLE  ALT=\"m+=+%28d+-+b%29%2F%28c+-+a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "And, in order to not run into the undefined situation of division by zero, we cannot have a = c, otherwise you would have:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28d+-+b%29%2F0 ALIGN=MIDDLE  ALT=\"m+=+%28d+-+b%29%2F0\"   DISABLED_style= \"max-width:90%; height:auto;\" > and this is not defined. </SPAN>\n" );
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