Moving Average: Calculation of the mean (average) of a set of data covering a defined period of time. For examplr, a weekly moving average will cover the data recorded over the most recent 7-day period. A series of moving averages can be used to identify the trend shown within a set of data.
Trend: The underlying pattern of change indicated within a set of numerical data.
Extrapolation: Using the previous patterns of numerical data in order to predict values in the future.
Moving Averages: Statistics used to analyse trends in the recent past so that a firm can predict future sales (through extrapolation).
Fluctuations or Variations: Periods of time when sales are above or below the trend
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