Question: Write a formula for a linear function that models the situation. Choose both an appropriate name and an appropriate variable for the function. State what

Write a formula for a linear function that models the situation. Choose both an appropriate name and an appropriate variable for the function. State what the input variable represents and the domain of the function. Assume that the domain is an interval of the real numbers.

In 1900 the average number of people per square mile in the United States was 21.5, and it increased, on average, by 6 people every 10 years until 2020. 

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