there are 300 people that live within 100 miles of this area.
Within this apartments area, there is 6 people, us 4 are the stay at home people while the other two have jobs far away
I am the only farmer in 50 miles, the next one is actually 100 miles west , or is it east
Arithmetic density means the total number of people living in a certain area. People can use this on a daily basis because if someone is moving or wanting to see how populated an area is then this would be perfect from them.
The number of people per unit square of an area , you could figure out how many people lived in a certain nieghborhood vs in the entire area given, this one gives a more closer look to the area.
Agriculture density means the number of farmers per unit square just like the last one. This would help if someone wanted to see which area had more populated farmers in the area or if they are more actually agriculture then other areas.