A student is running a 10-kilometer race. He runs 1 kilometer every 4 minutes. Select the function that describes his distance from the finish line after x minutes.
Explain your answer (if possible).
A) f of x equals one-fourth x plus 4
B) f of x equals negative one-tenth x plus 4
C) f of x equals one-tenth x plus 10
D) f of x equals negative one-fourth x plus 10