Answer:
adjusted exponential smoothing; linear regression.
Explanation:
A time series can be defined as a technique used in statistical analysis and it involves indexing sets of data elements in a timely or successive order i.e sequentially.
Two time series techniques that are appropriate when the data display a strong upward or downward trend are adjusted exponential smoothing and linear regression.
An adjusted exponential smoothing is a statistical technique used for forecasting through the calculation of the weighted average of an actual value.
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