document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=628464>Question 628464</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Here is my question....How would I know, in a linear story problem, that I would need to use X and Y variables or I could use only X variable?  I cannot seem to grasp the relationships in the problems that would tell me to only use X or to use X and Y. And my instructor was not able to explain it either.  Thank you for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #395641 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=395641\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you have two unknown quantities, then you would use two variables to represent them (eg: length and width). If you have one unknown quantity, then you would use one variable (eg: time)\r<BR>\n" );
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document.write( "Without the actual specific problem, there's not much more I can say about it. </SPAN>\n" );
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