document.write( "Question 473955: In 1992 the life expectancy of males in a certein country was 64.1 years. In 1996, it was 66.5 years. let E represent the life expectancy in year t and let t represent the number of years sence 1992. \r
\n" ); document.write( "\n" ); document.write( "The linear function E(t) that fits the data is? \n" ); document.write( "
Algebra.Com's Answer #325078 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
The linear function looks like
\n" ); document.write( "\"+y+=+m%2Ax+%2B+b+\"
\n" ); document.write( "where \"+m+\" = slope
\n" ); document.write( "and \"+b+\" = y-intercept
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\n" ); document.write( "For this problem:
\n" ); document.write( "Replace \"y\" with \"+E%28t%29+\"
\n" ); document.write( "Replace \"+x+\" with \"+t+\"
\n" ); document.write( "-----------------
\n" ); document.write( "Now you have
\n" ); document.write( "\"+E%28t%29+=+m%2At+%2B+b+\"
\n" ); document.write( "Note that when \"+t+=+0+\", \"+E%280%29+=+b+\"
\n" ); document.write( "and \"+E%280%29+=+64.1+\"
\n" ); document.write( "------------------
\n" ); document.write( "Now you have
\n" ); document.write( "\"+E%28t%29+=+m%2At+%2B+64.1+\"
\n" ); document.write( "Now you have to find \"m\", the slope of the line
\n" ); document.write( "\"m\" is the change in \"+E%7Bt%29+\" divided by
\n" ); document.write( "the change in \"+t+\"
\n" ); document.write( "\"+m+=+%28+66.5+-+64.1+%29+%2F+%284+-+0%29+\"
\n" ); document.write( "\"+m+=+2.4+%2F+4+\"
\n" ); document.write( "\"+m+=+.6+\"
\n" ); document.write( "Now you have
\n" ); document.write( "\"+E%28t%29+=+.6t+%2B+64.1+\"
\n" ); document.write( "------------------
\n" ); document.write( "check answer:
\n" ); document.write( "\"+E%284%29+=+.6%2A4+%2B+64.1+\"
\n" ); document.write( "\"+E%284%29++=+2.4+%2B+64.1+\"
\n" ); document.write( "\"+E%284%29+=+66.5+\"
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "
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