A farmer buys a new tractor for $156,000 and assumes that it will have a trade-in value of $84,000 after 10 years. The farmer uses a constant rate of depreciation to determine the annual value of the tractor. a. Find a linear model for the depreciated value V of the tractor t years after it was purchased. b. What is the depreciated value of the tractor after 6 years? c. When will the depreciated value fall below $80,000? d. Does the linear model seem to be a good representation of the depreciation of the tractor? Why or why not?

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