document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=234739>Question 234739</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me solve this proof<BR>\n" );
document.write( "The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173090 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=173090\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2<BR>\n" );
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document.write( "y1-y2 = -(y2-y1)<BR>\n" );
document.write( "Same with the x terms<BR>\n" );
document.write( "It's both NUM and DEN times -1, which is no change.<BR>\n" );
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