document.write( "Question 131682: The velocity of a falling object is a linear function of the time t it has been falling. If v = 3 when t = 0 and v = 80 when t = 11, express v as a function of t. \n" ); document.write( "
Algebra.Com's Answer #96134 by dkspoet(13)\"\" \"About 
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If velocity v is a linear function of time t then it must follow the equation
\n" ); document.write( "v = at + b, where a and b are constants.
\n" ); document.write( "Now v=3 at t=0 hence 3 = 0xt + b = b
\n" ); document.write( "Now v=80 at t=11 hence 80 = 11 x a + b = 11 x a + 3 ie 80-3 = 11 x a
\n" ); document.write( "ie 77 = 11 x a ie 77/11 = a ie a =7
\n" ); document.write( "hence the equation is v = 7t + 3
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