document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466432>Question 466432</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i seriously need some help with this problem!  in 1993, the life expectancy of males in a certain country was 66.8 years.  in 2000, it was 70.4 years.  let E represent the life expectancy in year t and let t represent the number of years since 1993.\r<BR>\n" );
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document.write( "the linear function 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 males in 2003.<BR>\n" );
document.write( "E(10) = ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #319925 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=319925\">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 66.8 years.<BR>\n" );
document.write( " in 2000, it was 70.4 years.<BR>\n" );
document.write( " let E represent the life expectancy in year t and let t represent the number of years since 1993.<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Find the slope<BR>\n" );
document.write( "In 1993; x1=0 and y1=66.8<BR>\n" );
document.write( "In 2000; x2=7 and y2=70.4<BR>\n" );
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document.write( "Find the slope (m) using the slope equation: m = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y2-y1%29%2F%28x2-x1%29 ALIGN=MIDDLE  ALT=\"%28y2-y1%29%2F%28x2-x1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "m = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2870.4-66.8%29%2F%287+-+0%29%29 ALIGN=MIDDLE  ALT=\"%2870.4-66.8%29%2F%287+-+0%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283.6%29%2F%287%29 ALIGN=MIDDLE  ALT=\"%283.6%29%2F%287%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <BR>\n" );
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document.write( "Use the point/slope formula to write the equation; y - y1 = m(x - x1)<BR>\n" );
document.write( "y - 66.8 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.6%2F7 ALIGN=MIDDLE  ALT=\"3.6%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >(x - 0)<BR>\n" );
document.write( "y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.6%2F7 ALIGN=MIDDLE  ALT=\"3.6%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >x + 66.8<BR>\n" );
document.write( ":<BR>\n" );
document.write( "therefore:<BR>\n" );
document.write( "The Linear function E(t) that fits the data is.<BR>\n" );
document.write( "E(t)= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.6%2F7 ALIGN=MIDDLE  ALT=\"3.6%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >t + 66.8<BR>\n" );
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document.write( "Use the Function to predict the life expectancy of males in 2003.<BR>\n" );
document.write( "This means t=10; substitute 10 for t in the equation<BR>\n" );
document.write( "E(10)= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3.6%2F7 ALIGN=MIDDLE  ALT=\"3.6%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >(10) + 66.8<BR>\n" );
document.write( "E(10)= 5.1 + 66.8<BR>\n" );
document.write( "E(10)~ 72 yrs is the life expectancy in 2003<BR>\n" );
document.write( " </SPAN>\n" );
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