document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=47505>Question 47505</A>: <I><SPAN STYLE=\"word-break: break-all;\"> We know that perimeter of the circle C = 2pr and its area S = pr^2. Which of these two equations is linear and which is not? Why?\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 #31369 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=31369\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> C=2pr is linear because it is a function in \"r\" and r is to the 1st power.\r<BR>\n" );
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document.write( "S=pr^2 is not linear because it is a function in \"r\" and r is raised to<BR>\n" );
document.write( "the 2nd power.\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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