document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=338731>Question 338731</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1993, the life expectancy of males in a certain country was 69.1 years. In 2000,it was 71.7 years. Let e represent the life expectancy in year t and let t represent the numbers of years since 1993.<BR>\n" );
document.write( "The linear function E(t)that fits the data is<BR>\n" );
document.write( "E(t)=<BR>\n" );
document.write( "Use the function to predict the life expectancy of males in 2005<BR>\n" );
document.write( "E(12)= </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #242799 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=242799\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In 1993, the life expectancy of males in a certain country was 69.1 years. <BR>\n" );
document.write( "(0,69.1)<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "In 2000,it was 71.7 years. <BR>\n" );
document.write( "(7,71.7)<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "slope = (71.7-69.1)/(7-0) = 2.6/7 = 13/35<BR>\n" );
document.write( "intercept = E(0) = 69.1<BR>\n" );
document.write( "----------\r<BR>\n" );
document.write( "\n" );
document.write( "Let E represent the life expectancy in year t and let t represent the numbers of years since 1993.<BR>\n" );
document.write( "The linear function E(t)that fits the data is<BR>\n" );
document.write( "E(t)= (13/35)t + 69.1<BR>\n" );
document.write( "-------------------------------------------<BR>\n" );
document.write( "Use the function to predict the life expectancy of males in 2005<BR>\n" );
document.write( "E(12)= (13/35)12+69.1 <BR>\n" );
document.write( "E(12) = 73.56 years<BR>\n" );
document.write( "=============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );