Answer: The correct option is
(D)
Step-by-step explanation: Given that a student is running a 5-kilometer race. He runs 1 kilometer every 3 minutes.
We are to select the function that describes his distance from the finish line after x minutes.
When the student reaches the finish line, he already covered a distance of 5 kilometers.
Now, in 3 minutes, distance covered by the student = 1 kilometer.
So, in 1 minute, distance covered by the student is given by
Therefore, in x minutes, the distance covered by the student is
That is, the total distance from the finish line after x minutes is given by
Thus, option (D) is CORRECT.