document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83510>Question 83510</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am not understanding \"undefined\"<BR>\n" );
document.write( "Find the slope of the line passing through the points (2,-5) and (-10,-5)<BR>\n" );
document.write( "a). -12<BR>\n" );
document.write( "b). undefined<BR>\n" );
document.write( "c) 1<BR>\n" );
document.write( "d) 0<BR>\n" );
document.write( "please help  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60030 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=60030\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the slope of the line passing through the points (2,-5) and (-10,-5)<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Your line has a slope = [-5--5]/[-10-2]= 0/-12 = 0<BR>\n" );
document.write( "Notice that the two points have the same y value so the line<BR>\n" );
document.write( "is parallel to the x axis.  The slope is zero because y does<BR>\n" );
document.write( "not change no matter how much change there is in x.<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "Undefined refers to a slope whose value cannot be stated.<BR>\n" );
document.write( "A vertical line (like x=5) has an \"undefined\" slope because the <BR>\n" );
document.write( "y-value rises any amount you care to consider even though<BR>\n" );
document.write( "the x value does not change; so the slope = (any number)/0<BR>\n" );
document.write( "which is \"undefined\".<BR>\n" );
document.write( "=====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );