Parcel Post Postal Rates The table that follows gives U.S. postage rates for local parcel...

Parcel Post Postal Rates The table that follows gives U.S. postage rates for local parcel post mail for zone 3. Each given weight refers to the largest weight package that can be mailed for the corresponding postage.

a. Find a linear function P = f (W) that models the postage in the table as a function of the weight in the table.

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b. Compare the outputs of the model with the data outputs from the table for several values in the table. Is the model a perfect fit?