(Solved): a. Find the first differences in the numbers of tickets sold, and convert them into average rates o ...

a. Find the first differences in the numbers of tickets sold, and convert them into average rates of change. b. When were ticket sales growing most rapidly? How rapidly (on average) were they growing at that time? c. If the travel agent made a \( \$ 25 \) commission on every ticket sold, how rapidly on average did the agent's commission revenue increase between weeks 7 and 10 ?