Final answer:
The equation f(x) = 2 + 0.05x represents the amount of time that Professor Z spends preparing for a class, where x is the number of students in the class. For each additional student in the class, the time spent preparing for class increases by 0.05 hours.
Step-by-step explanation:
The equation f(x) = 2 + 0.05x represents the amount of time that Professor Z spends preparing for a class, where x is the number of students in the class.
This equation tells us that for each additional student in the class, the time spent preparing for class increases by 0.05 hours. So option A is the correct answer.