How do you calculate the starting T value when it is not provided?

Use the data shown below to answer the problems in this section. After plotting demand for four periods, an emergency room manager has concluded that a trend-adjusted exponential smoothing model is appropriate to predict future demand. The initial estimate of trend is based on the net change for periods one to four. Use alpha of 0.30 and beta of 0.40 . The demand is shown below. Students often struggle with trend adjusted exponential smoothing problems. To help you prefect your calculations, this section will ask about the S and T values in addition to the forecasts. That way, you can check all of your calculations. I strongly encourage you to rework these problems until you are certain you know how to work them