Suppose the number of hours of sleep you obtain, s, is a linear function of the number of caffeinated beverages you drink, n. Furthermore, you have collected data to show that if you drink 3 caffeinated beverages you obtain 7 hours of sleep; whereas, if you drink 12 caffeinated beverages you obtain 1 hour of sleep. Find a formula for this linear function. Be careful to identify which variable is the independent variable. Show or explain your work. Interpret the slope within the context of this problem.

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