Question: Modeling with data the following data gives the volume of cargo (in millions of tons) moved in the port of new york/new jersey from 1991 through 2002.
A. Use cubicreg to find a third-degree polynomial regression model for the data. Let t 0 correspond to 1991.
B. Plot the graph of v in the viewing window [0, 11] × [0, 25].
C. Where is v increasing? What does this tell us?
D. Verify the result of part (c) analytically.