document.write( "Question 239224: In 1993, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 69.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993.\r
\n" ); document.write( "\n" ); document.write( "The linear function E(t) that fits this data is?
\n" ); document.write( "E(t)=_t+_\r
\n" ); document.write( "\n" ); document.write( "Use the function to predict the life expectancy of males in 2004.
\n" ); document.write( "E(11)=_ \n" ); document.write( "
Algebra.Com's Answer #175693 by ankor@dixie-net.com(22740)\"\" \"About 
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In 1993, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 69.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993.
\n" ); document.write( "The linear function E(t) that fits this data is
\n" ); document.write( "E(t)=_t+_
\n" ); document.write( ":
\n" ); document.write( "Find the slope
\n" ); document.write( "In 1993; t1=0 and E1=66,3
\n" ); document.write( "In 1997; t2=4 and E2=69.6
\n" ); document.write( ":
\n" ); document.write( "Find the slope (m) using the slope equation: m = \"%28E2-E1%29%2F%28t2-t1%29\"
\n" ); document.write( "m = \"%2869.6-66.3%29%2F%284+-+0%29%29\" = \"%283.3%29%2F%284%29\" = .825
\n" ); document.write( "therefore:
\n" ); document.write( "The Linear function E(t) that fits the data is.
\n" ); document.write( "E(t)= .825t + 66.3
\n" ); document.write( ":
\n" ); document.write( "Use the Function to predict the life expectancy of males in 2004.
\n" ); document.write( "This means t=11; substitute 11 for t in the equation
\n" ); document.write( ":
\n" ); document.write( "E(11)= .825(11) + 66.3
\n" ); document.write( "E(11)= 9.075 + 66.3
\n" ); document.write( "E(11)= 75.4 yrs is the life expectancy in 2004
\n" ); document.write( "Rounded to the nearest tenth.\r
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