What is the first step to making a migration map?
The graph shows data for San Jose, California.

Why do researchers mostly study migration patterns?
What is an example of a historical record that could be considered reliable?
How can a time line be helpful when creating a migration map?
The graph shows population statistics from the 1800s.

Which question is the most helpful to ask to determine if a source is reliable?
What is the purpose of the US Census Bureau?
What is one benefit of using secondary sources in historical research?
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