Forecasts
If a time series has no seasonal component, two simple forecasting methods are with linear regression (if there is a linear trend) and exponential smoothing (especially if there is a cyclical component).
The exercise below shows a time series and you are asked to forecast a future value both with exponential smoothing and linear regression. A list of exponentially smoothed values is provided and regression output.
Note that the regression output is based on a coded year. The year that is coded as zero is defined in the question (and varies between different versions of the question).