document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=478665>Question 478665</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1960, the life expectancy in the UK was 71.1 years.  In 2008, it was 79.9 years. Let F(t) = life expectancy and t = the number of years since 1960. <BR>\n" );
document.write( "a)	Find a linear function that fits the data.<BR>\n" );
document.write( "b)	Use the function of Part (a) to estimate the life expectancy in 2010.<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 #327971 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327971\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> year		life expectancy					<BR>\n" );
document.write( "1960		71.1	years				<BR>\n" );
document.write( "2008		79.9	years				<BR>\n" );
document.write( "Difference							<BR>\n" );
document.write( "48		8.8					<BR>\n" );
document.write( "Increase in life expectancy per year =			8.8	/	48	=	0.18<BR>\n" );
document.write( "							<BR>\n" );
document.write( "F(t)=	71.1	+	0.18	t 			<BR>\n" );
document.write( "							<BR>\n" );
document.write( "2010	t=	50					<BR>\n" );
document.write( "							<BR>\n" );
document.write( "F(t)=	71.1	+	0.18	*	50		<BR>\n" );
document.write( "							<BR>\n" );
document.write( "F (	2010	)=	80.27	years			<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );