document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43456>Question 43456</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the line of best fit for the set of data below to approximate the value of y when x = 4.<BR>\n" );
document.write( "x -2 -1 0 1 2 <BR>\n" );
document.write( "y 7 6 3 2 0 \r<BR>\n" );
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document.write( "  a. y = -3.6    <BR>\n" );
document.write( "  b. -0.22    <BR>\n" );
document.write( "  c. 10.8    <BR>\n" );
document.write( "  d. -10.8    <BR>\n" );
document.write( "  e. None of the others   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28596 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=28596\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x	y  (x-xavg)^2 (y-yavg)^2  (x-x')(y-y')<BR>\n" );
document.write( "	-2	7	4	11.56	-6.8<BR>\n" );
document.write( "	-1	6	1	5.76	-2.4<BR>\n" );
document.write( "	0	3	0	0.36	0<BR>\n" );
document.write( "	<BR>\n" );
document.write( "        1	2	1	2.56	-1.6<BR>\n" );
document.write( "	2	0	4	12.96	-7.2<BR>\n" );
document.write( "total	0	18	10	33.2	-18<BR>\n" );
document.write( "average	0	3.6	2	6.64	-3.6<BR>\n" );
document.write( "r.m.s.devn.			1.414213562	2.576819745	\r<BR>\n" );
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document.write( "xavg=x'=0	yavg=y'=3.6	sigmax=sx=1.414		sigmay=sy=2.577	<BR>\n" );
document.write( "r=-3.6/(sx*sy)=	-0.987958433				<BR>\n" );
document.write( "line of best fit is 		<BR>\n" );
document.write( "y-y'=(r*sy/sx)(x-x')				<BR>\n" );
document.write( "y-3.6=(-0.98796*2.577/1.414)(x-0)					<BR>\n" );
document.write( "y-3.6=-1.8x					<BR>\n" );
document.write( "y+1.8x-3.6=0					<BR>\n" );
document.write( "at x=4…we get…y=-3.6	<BR>\n" );
document.write( "A IS THE ANSWER </SPAN>\n" );
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