document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=23541>Question 23541</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have 2 series, \r<BR>\n" );
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document.write( "	x	1,2,3,4,5,6,7,8,9,10,11,12<BR>\n" );
document.write( "            y           85,60,160,140,235,200,270,200,225,100,60,-140\r<BR>\n" );
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document.write( "What is the quadratic equation for above series ?\r<BR>\n" );
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document.write( "Thanks,<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 #12375 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=12375\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the Quadratic Regression capability<BR>\n" );
document.write( "of a TI-83 calculator the best-fit quadratic<BR>\n" );
document.write( "is the following:<BR>\n" );
document.write( " y = -8.0479x^2 + 93.8063x=36.93546\r<BR>\n" );
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document.write( "The R^2 for this quadratic model is 0.80 which<BR>\n" );
document.write( "shows it is a pretty good fit.\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "stan H. </SPAN>\n" );
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