document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=513728>Question 513728</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1995, the life expectancy of males in a certain country was 68.8 years. In 1999, it was 71.0 years.Let E represent the life expectancy in year t and let t represent the number of years since 1995. \r<BR>\n" );
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document.write( "The linear function E(t) that fits the data is: E(t)= ?t+?\r<BR>\n" );
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document.write( "Use the function to predict the life expectancy of malkes in 2009\r<BR>\n" );
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document.write( "E(14)= ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #343117 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=343117\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In 1995, the life expectancy of males in a certain country was 68.8 years. <BR>\n" );
document.write( "In 1999, it was 71.0 years.<BR>\n" );
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document.write( "You have two points: (0,68.8) and (4,71) where 0 corresponds to 1995.<BR>\n" );
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document.write( "Let E represent the life expectancy in year t and let t represent the number of years since 1995.<BR>\n" );
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document.write( "slope = (71-68.8)/(4-0) = 0.55<BR>\n" );
document.write( "intercept = 68.8<BR>\n" );
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document.write( "The linear function E(t) that fits the data is: <BR>\n" );
document.write( "E(t)= 0.55t + 68.8<BR>\n" );
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document.write( "Use the function to predict the life expectancy of males in 2009<BR>\n" );
document.write( "From 1995 to 2009 is 14 years: <BR>\n" );
document.write( "E(14)= 0.55*14 + 68.8<BR>\n" );
document.write( "E(14) = 76.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "====================<BR>\n" );
document.write( " </SPAN>\n" );
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