| 1 - 6 m | = 2 can equal to m = - 1/6 and m = 1/2
The United States Navy grew rapidly during World War II from 1941–45, and played a central role in the war against Japan. It also assisted the British Royal Navy in the naval war against Germany and Italy
Essentially, some cities can grow in a "spreading out manner," until they eventually hit their respective municipal borders. However, once a city cannot grow laterally anymore, they grow upwards, this is expressed as the buildings we see in urbanized areas throughout the world.