Cruise Tickets A travel agent vigorously promotes cruises to Alaska for several mont...

Cruise Tickets A travel agent vigorously promotes cruises to Alaska for several months. The table shows the total (cumulative) sales every 3 weeks since the beginning of the special promotion.

a. Find a logistic model for cumulative sales. Why is a logistic model appropriate to model these data?

b. Calculate the percentage increase in the number of tickets sold between weeks 1 and 15 and between weeks 1 and 25.