Question: Determine whether a linear function or a quadratic function would be a more appropriate model for each set of graphed data. If linear, tell whether

Determine whether a linear function or a quadratic function would be a more appropriate model for each set of graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, tell whether the coefficient of x2 should be positive or negative.


Average Daily Volume of First-Class Mail Pieces (in millions) 100 90 80

Average Daily Volume of First-Class Mail Pieces (in millions) 100 90 80 70 60 0 1 1 2 1 1 3 Years Data from USPS. 4 5

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