What were some factors that contributed to the population growth in the five cities shown on the graph between 1870 and 1920?

To analyze the factors that contributed to the population growth in the five cities shown on the graph between 1870 and 1920, you can follow these steps:

1. Identify the five cities: Look at the graph and note the names of the cities represented. This will give you a starting point to investigate the factors influencing their population growth.

2. Research historical events and developments: To understand the factors behind the population growth, research the historical events, economic advancements, and social changes that occurred during this time period. Look for significant factors such as industrialization, immigration, urbanization, and technological advancements.

3. Study industrialization: Industrialization was a major factor that fueled population growth during this period. Investigate whether the cities shown on the graph experienced industrial booms. Factors such as the establishment of factories, expansion of industries, and the availability of jobs might have attracted people to these cities in search of employment opportunities.

4. Explore immigration patterns: Examine the immigration patterns during this time. Did any of these cities experience significant immigration influxes? Some cities attracted immigrants due to promises of employment, religious freedom, or political stability. Immigration can often be a crucial factor contributing to population growth.

5. Analyze urbanization: Consider the degree of urbanization in these cities. During this period, many people migrated from rural areas to urban centers in search of better opportunities. Analyze whether the cities shown on the graph were experiencing urbanization and whether this trend aligns with their population growth.

6. Assess technological advancements: Technological advancements, such as transportation innovations (railroads, steamships) and communication methods (telegraph, telephone), played a role in facilitating population growth. Investigate whether these cities had access to improved transportation and communication networks during this time.

7. Evaluate other social and economic factors: Look for additional factors that could have influenced population growth in these cities. Factors such as the availability of housing, access to healthcare and education, political stability, and cultural attractions can all contribute to an increase in population.

By thoroughly researching these factors for each of the cities shown on the graph between 1870 and 1920, you should be able to uncover the specific factors that contributed to their population growth during this time period.

To provide a comprehensive answer, it would be helpful if you could provide the names of the five cities shown on the graph.