document.write( "Question 252643: In 1920, the record for a certain race was 46.6 sec. In 1940 it was 46.2 sec.
\n" ); document.write( "Let R(t)= the record in the race and t= the number of years since 1920.\r
\n" ); document.write( "\n" ); document.write( "Find the linear function that fits the data
\n" ); document.write( "R(t)=\r
\n" ); document.write( "\n" ); document.write( "What is the predicted record for 2003? 2006?\r
\n" ); document.write( "\n" ); document.write( "In what year will the record be 44.62 sec?
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Algebra.Com's Answer #184738 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
set t=year and R(t)=race time use r(t) as the y and t as the x
\n" ); document.write( "find the find the slope difference in y's over difference in x's
\n" ); document.write( "m is slope
\n" ); document.write( "m=(y1-y2)/(x1-x2)
\n" ); document.write( "then plug one point data as y and x
\n" ); document.write( "y=m(x)+b
\n" ); document.write( "and solve for b
\n" ); document.write( "then substitute r(t) for y and t for x
\n" ); document.write( "and then substitute 2003 and later 2006 for t
\n" ); document.write( "and find r(t)
\n" ); document.write( "for the final question, find t when r(t)=44.62
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