The function is determined using speed and is found to be d = 120t.
Speed is generally the change in distance per unit time. (rate of change of distance)
To calculate speed, we will use speed = distance/time.
speed = 360/3
= 120km/hr
Since, the train is moving with a constant speed the ratio of distance and time will be equal to 120 throughout the journey.
120 = d/t
Hence, d = 120t.
To learn more about speed visit the link below:
brainly.com/question/28224010
#SBJ4
