document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=94361>Question 94361</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with two different charts:\r<BR>\n" );
document.write( "\n" );
document.write( "n    1    2     3     4     5  <BR>\n" );
document.write( "f(n) 0    4     20    54    112\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "n    1    2     3     4     5<BR>\n" );
document.write( "f(n) 2    17    86    275   674\r<BR>\n" );
document.write( "\n" );
document.write( "Need to find degree and equation for the polynomial<BR>\n" );
document.write( "Don't really understand<BR>\n" );
document.write( "Thank you\r<BR>\n" );
document.write( "\n" );
document.write( "LLO </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #68721 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=68721\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> n 1 2 3 4 5 <BR>\n" );
document.write( "f(n) 0 4 20 54 112 <BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Its not linear because there is no constant difference in the f(n) line<BR>\n" );
document.write( "Its not exponential because there is no constant ratio between consecutive terms.<BR>\n" );
document.write( "Try a Quadratic Regression test and get: f(n) = 9n^2-26.6n+18.8 with R^2 = 99.9<BR>\n" );
document.write( "which is very high.<BR>\n" );
document.write( "I looked at Cubic and Quartic Regression test and got results that were worse.<BR>\n" );
document.write( "------------------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "n 1 2 3 4 5<BR>\n" );
document.write( "f(n) 2 17 86 275 674 <BR>\n" );
document.write( "Need to find degree and equation for the polynomial<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Quadratic Regression gives this result:fn)=63.4n^2-220.37n+174.2<BR>\n" );
document.write( "with R^2=0.992<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );