The table shows the difference d (in cents) of this year's average monthly gas price and the previous year's average monthly gas
price. For example, in month 1, d=-2. So, the average gas price was 2 cents below the previous year's gas price. Explain how you know the table represents a function.
Graph the function and identify its domain and range.
What does a point in Quadrant IV mean in terms of this situation?
