document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=18682>Question 18682</A>: <I><SPAN STYLE=\"word-break: break-all;\"> do the formulas for the area of a circle and the circumfrence of a circle represent linear relationships? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #26608 by </B><A HREF=/tutors/aboutme.mpl?userid=astromathman><B>astromathman(21)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=astromathman><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=astromathman><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=26608\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A linear relationship is one where the variables are, at most, to the first power.  The Circumference of a circle meets this criterion:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C=2%2Api%2Ar ALIGN=MIDDLE  ALT=\"C=2%2Api%2Ar\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  The area, on the other hand, has an <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5E2 ALIGN=MIDDLE  ALT=\"r%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, so it is not a linear relationship.  It is a quadratic relationship. </SPAN>\n" );
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