Kim is studying the sale of a particular brand of cereals from the year 2000 to 2010. She writes the following function to model the sale of the cereal S(t), in million dollars, after t years:
S(t) = t2 + 7t + 69
Part A: What does the y-intercept of the graph of the function represent? (4 points)
Part B: What is the reasonable domain of the graph of the function? (3 points)
Part C: What is the average rate of change of the sale of the cereal from the first year to the fourth year? Show your work. (3 points)

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