document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=584368>Question 584368</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I do not know how to solve this! Please someone show me step by step so I can understand!?!!??!?!??!?\r<BR>\n" );
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document.write( "In 1992, life expectancy of males was 70.7 years. In 1996, it was 74.3 years. Let E represent life expectancy in year t and let t represent the number of years since 1992.<BR>\n" );
document.write( "The linear function E(t) that fits the data is<BR>\n" );
document.write( "E(t) = ? t + ?<BR>\n" );
document.write( "Use the function to predict life expectancy in males in 2007<BR>\n" );
document.write( "E(15)= ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #372785 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=372785\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's say the function is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%28t%29=mt%2Bb ALIGN=MIDDLE  ALT=\"E%28t%29=mt%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" > and we want to find the numbers m abd b.<BR>\n" );
document.write( "For the year 1992, t=0, because it is 0 years after 1992.<BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%280%29=m-0%2Bb=b=70.7 ALIGN=MIDDLE  ALT=\"E%280%29=m-0%2Bb=b=70.7\"   DISABLED_style= \"max-width:90%; height:auto;\" > gives us <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highligth%28b=70.7%29 ALIGN=MIDDLE  ALT=\"highligth%28b=70.7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For 1996, t=4, because 1996 is 4 years after 1992, and the life expectancy of males is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%284%29=m%2A4%2B70.7=74.3 ALIGN=MIDDLE  ALT=\"E%284%29=m%2A4%2B70.7=74.3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "That gives us the equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m%2B70.7=74.3 ALIGN=MIDDLE  ALT=\"4m%2B70.7=74.3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m%2B70.7=74.3 ALIGN=MIDDLE  ALT=\"4m%2B70.7=74.3\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m%2B70.7-70.7=74.3-70.7 ALIGN=MIDDLE  ALT=\"4m%2B70.7-70.7=74.3-70.7\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m=3.6 ALIGN=MIDDLE  ALT=\"4m=3.6\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m%2F4=3.6%2F4 ALIGN=MIDDLE  ALT=\"4m%2F4=3.6%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28m=0.9%29 ALIGN=MIDDLE  ALT=\"highlight%28m=0.9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the function is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28E%28t%29=0.9t%2B70.7%29 ALIGN=MIDDLE  ALT=\"highlight%28E%28t%29=0.9t%2B70.7%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For 2007, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=2007-1992=15 ALIGN=MIDDLE  ALT=\"t=2007-1992=15\"   DISABLED_style= \"max-width:90%; height:auto;\" >. The life expectancy for males in 2007 can be predicted as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E%2815%29=0.9%2A15%2B70.7=13.5%2B70.7 ALIGN=MIDDLE  ALT=\"E%2815%29=0.9%2A15%2B70.7=13.5%2B70.7\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28E%2815%29=84.2%29 ALIGN=MIDDLE  ALT=\"highlight%28E%2815%29=84.2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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