Make a rough sketch of a graph of the function, algebra homework help

Do the following for the function given below.

(time, population of a country), where time is measured in years after 1900

a.	Describe an appropriate domain and range for the function.
b.	Make a rough sketch of a graph of the function.
c.	Briefly discuss the validity of the graph as a model of the true function.

a. Choose the appropriate domain for the function below.

A.The domain is all populations during the given years 400 people to 425 people.

B. The domain is all populations during the given years or 400 million people to 1.3 billion people.

C. The domain is all years from 1900 to 2010 or 0 to 110, where 1900 is year 0.

D. The domain is all years from 1900 to 2010 or 1900 to 2010, where 1900 is year 0.