document.write( "Question 1145620: Nick runs a 100-meter race. 5 seconds after the race started Nick is 45 meters from the starting line and reaches his max speed; he runs at this max speed for the rest of the race. Nick notices that he is 85 meters from the starting line 10 seconds after the race started.\r
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Algebra.Com's Answer #766845 by ikleyn(52824) $\"\"$ $\"About$

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document.write( "The distance d(x) from the starting line x seconds after the race started (provided x >= 5) is\r\n" );
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document.write( "    d(x) = 45 +  = 45 + 8*(x-5).\r\n" );
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document.write( "It is the standard interpolation/extrapolation linear function, based on given data.\r\n" );
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document.write( "Linear interpolation/extrapolation formula is applicable in this case,\r\n" );
document.write( "since after 5 seconds Nick runs with uniform speed.\r\n" );
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document.write( "His speed is   =  = 8 meters per second.\r\n" );
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