document.write( "Question 421103: in 1920, the record for a certain race was 46.9 sec. in 1940, it was 46.5 sec. Let R(t)= the record in the race and t= the number of years since 1920. fine the linear function that fit the data R(T)= \n" ); document.write( "

Algebra.Com's Answer #294117 by stanbon(75887) $\"\"$ $\"About$

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in 1920, the record for a certain race was 46.9 sec. in 1940, it was 46.5 sec. Let R(t)= the record in the race and t= the number of years since 1920. fine the linear function that fit the data R(T)=
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\n" ); document.write( "You have 2 points: (0,46.9) and (20,46.5)
\n" ); document.write( "---
\n" ); document.write( "slope = 0.4/-20 = -0.02
\n" ); document.write( "---
\n" ); document.write( "Form: R(t) = mx + b
\n" ); document.write( "R(t) = -0.02x+46.9
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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