document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=384283>Question 384283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can someone please tell me if either of these answers are correct please.<BR>\n" );
document.write( "In 1990, the life expectancy of females was 78.8 years.  In 2001, it was 79.8 years. Let F(t) = life expectancy and t = the number of years since 1990. <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" );
document.write( "Show your work not just the final answer.\r<BR>\n" );
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document.write( "F(t) = mt + c<BR>\n" );
document.write( "Substituting the first set of figures, F(t) = 78.8 when t = 0 then, 78.8 = (m x 0) + c : c = 78.8<BR>\n" );
document.write( "Substituting the second set of figure, F(t) = 79.8 when t = 11 then, 79.8 = 11m + 78.8 : m = 1/11\r<BR>\n" );
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document.write( "a) The linear function:  F(t) = t/11 + 78 .8\r<BR>\n" );
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document.write( "b) 2010, t = 20  so, F(t) = 20/11 + 78.8 = 1.82 + 78.8 = 80.62  years\r<BR>\n" );
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document.write( "or\r<BR>\n" );
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document.write( "a) The linear function:  F(t) = t/11 + 78 .8\r<BR>\n" );
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document.write( "b) 2010, t = 20:  so, F(t) = 20/11 + 78.8 = 1.82 + 78.8 = 80.62  years\r<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 #272035 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=272035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In 1990, the life expectancy of females was 78.8 years. In 2001, it was 79.8 years. Let F(t) = life expectancy and t = the number of years since 1990. <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" );
document.write( "Show your work not just the final answer. \r<BR>\n" );
document.write( "\n" );
document.write( "F(t) = mt + c<BR>\n" );
document.write( "Substituting the first set of figures, F(t) = 78.8 when t = 0 then, 78.8 = (m x 0) + c : c = 78.8<BR>\n" );
document.write( "Substituting the second set of figure, F(t) = 79.8 when t = 11 then, 79.8 = 11m + 78.8 : m = 1/11 <BR>\n" );
document.write( "a) The linear function: F(t) = t/11 + 78 .8 <BR>\n" );
document.write( "b) 2010, t = 20 so, F(t) = 20/11 + 78.8 = 1.82 + 78.8 = 80.62 years <BR>\n" );
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document.write( "OK<BR>\n" );
document.write( "cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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