The value of a car, V, in dollars, t years after it is purchased is given by V = -1800t + 20,000.

Your entry must contain the following:

What is the y-intercept? What does it represent?
What is the slope? What does it mean in the context of the problem?
When will the car be worth $11,000? Show the steps you took to answer this question, and describe your process.
Using complete sentences, explain why this is important information for you to know.