【单选题】The trend forecast equation is Ŷ = 120 + 100t. The next forecast is for period 8. The typical seasonal index for period 8 is 0.80. What are the forecast sales for period 8?
【单选题】A company's annual profits have a trend line given by Y = 20t – 10, where Y is the trend in $'000 and t is the year with t = 0 in 20X0. What are the forecast profits for the year 20X9 using an additiv...