As industry grew, the

population of the United

States shifted and grew.

Based on the graph, if the

total population in 1820 was

about 10 million, how many

of those people lived in

cities?

Answer: About seven hundred thousand people.

Explanation:

So many people lived in urban areas during the 1920s. Official figures show an increase in the number of people in urban centres throughout the nineteenth century. Thus, in the 1950s, about 15% of the total population lived in cities. The reason for this is the fact that the process of industrialization did not happen "overnight" but developed throughout the century.