document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68162>Question 68162</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321356950/algebrahomeworkh>A Graphical Approach to Algebra and Trigonometry</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> The table lists the average tution and fees at public colleges and universities for selected years.  <BR>\n" );
document.write( "Year  1985 1990 1995 1999 2004<BR>\n" );
document.write( "Tuition and<BR>\n" );
document.write( "Fees ($s) 1242 1809 2860 3356 5132\r<BR>\n" );
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document.write( "(a) Find the equation of the least-squares regression line that models the data.(b) Graph the data and the regression line in the same viewing window. (c) Estimate tuition and fees in 2006. (d) Use the model to predict tuition and fees in 2010.\r<BR>\n" );
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document.write( "I am really bad at this.  Can you explain how you got the equation?  How you got those exact numbers in (a)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #48440 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=48440\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The table lists the average tution and fees at public colleges and universities for selected years. <BR>\n" );
document.write( "Year 1985 1990 1995 1999 2004<BR>\n" );
document.write( "Tuition and<BR>\n" );
document.write( "Fees ($s) 1242 1809 2860 3356 5132 <BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "If you have a TI calculator<BR>\n" );
document.write( "Enter the years in list L1<BR>\n" );
document.write( "Enter the averages in list L2<BR>\n" );
document.write( "Run the LinReg(ax+b) function against L1, L2, Y1 to get the regression equation<BR>\n" );
document.write( "into Y=.<BR>\n" );
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document.write( "(a) Find the equation of the least-squares regression line that models the data.<BR>\n" );
document.write( "The regression equation: Tuition&Fees = 198.49(year)-393,033.87<BR>\n" );
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document.write( "(b) Graph the data and the regression line in the same viewing window.<BR>\n" );
document.write( "Can't do that on this site.\r<BR>\n" );
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document.write( " (c) Estimate tuition and fees in 2006.<BR>\n" );
document.write( "Tuition(2006)=198.49(2006)-393,033.87<BR>\n" );
document.write( "Tuition(2006) = $5142.60<BR>\n" );
document.write( "I got this using the TABLE function of the TI-83<BR>\n" );
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document.write( " (d) Use the model to predict tuition and fees in 2010.<BR>\n" );
document.write( "Tuition(2010) is approx $5936.60 according to the TABLE.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );