Problem

Transportation CPI The CPI (consumer price index) values for transportation costs in...

Transportation CPI The CPI (consumer price index) values for transportation costs in the United States for certain years between 2000 and 2008 are shown below.

a. How does a scatter plot of the data indicate that a cubic model might be appropriate?

b. Align the data to the number of years since 2000. Find a cubic model for the CPI for transportation costs in the United States.

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Solutions For Problems in Chapter 1.11

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