Final answer:
The rate that best represents the relationship between the number of gas stations and the area of the city is 3 gas stations per square mile.
Step-by-step explanation:
To represent the relationship between the number of gas stations and the area of the city, we need to find a rate. The rate can be calculated as the number of gas stations per unit area. In this case, the number of gas stations is 960 and the area of the city is 320 square miles. So, the rate can be calculated as:
Rate = Number of gas stations / Area of the city
Rate = 960 / 320
Simplifying the rate gives us:
Rate = 3 gas stations per square mile