Suppose that a company has just purchased a new computer for ​$3000. The company chooses to depreciate using the​ straight-line method for 5 years.

​(a) Write a linear function that expresses the book value of the computer as a function of its age.
​(Type your answer in​ slope-intercept form.)
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(b) What is the implied domain of the function found in part ​(a)​?
​(Type your answer in interval​ notation.)
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(c) Use the graphing tool to graph the linear equation.

​(d) What is the book value of the computer after 2 ​years?

​(e) When will the computer be worth $600​?