The Demand for a Product for the Last Six Years

Multiple Choice

The demand for a product for the last six years has been 15,15,17,18,20,and 19.The manager wants to predict the demand for this time series using the following simple linear trend equation: tr_t = 12 + 2t.What are the forecast errors for the 5^th and 6^th years?

A) 0,-3
B) 0,+3
C) +2,+5
D) -2,-5
E) -1,-4