A student is running a 5-kilometer race. He runs 1 kilometer every 3 minutes. Select the function that describes his distance from the finish line after x minutes

D = distance from finish line

D = 5 - 1/3x

Distance from the finish line is equal to the distance of the start line from the finish line, minus one third of a km times the number of minutes hes been running.

using given variables; D = 5 - 1/3*3

D=5-3/3

D=5-1

D=4