A tourist center is open in Spring, Summer, Fall, Winter. The owner-manager hopes to improve scheduling of full-time employees by determining seasonal relatives for each of these seasons. Data on recent traffic at the center have been tabulated and are shown in the following table:
Year 2014 2015
Spring 24 28
Summer 20 22
Fall 16 19
Winter 13 15
Using the depersonalized data, it is observed that the demand is linearly increasing with time. The fitted trend line formulation is F(t) = 16.8+0.7t, where t=1 represents the Spring ’14. What would be your forecast for Spring ’16 considering the trend and seasonality? Show your work.