Question

A student is running a 3 km race he runs 1 km every two minutes. Select the function that describes distance from the finish line after X minutes

Answer 1

x - number of minutes;

f ( x ) - the distance from the finish line.

  x :        0     2      4      6

f ( x ) :    3      2      1     0

f ( x ) = 3 - x/2

Answer: B ) f ( x ) = -1/2 x + 3