The gravity model predicts that the optimal location of a service is (look this up if you need to) Group of answer choices directly related to the number of people and services in the area and inversely related to the lengths of highways and railways that access it. directly related to the range in the area and inversely related to the hinterland. directly related to the number of people in the area and inversely related to the distance people must travel to access it. directly related to the median of people in the area and inversely related to the meridian of people who travel to access it. directly related to the distance people must travel and inversely related to the number of people in the area