The value of most assets, such as a car or computer, depreciates, or drops, over time. When as asset depreciates by a fixed amount per year, the depreciation is called straight-line depreciation. Suppose a car has an initial value of $12,400 and depreciates $820 per year.
a. Write an expression to represent the value of the car after t years.
b. Set up an equation that answers the question: How long will it take for the value of the car to decrease to $2,000? Deconstruct this equation and state your answer in a complete sentence.