A regression analysis is a form of time series design that uses the data from the current year (period)to predict next year's (period's)demand,reflecting a linear relationship.

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A regression analysis is a statistical method used to determine the relationship between two or more variables. It is not necessarily a form of time series design, and it can be used to predict future values based on past data. However, it does not always reflect a linear relationship between variables.

A Regression Analysis Is a Form of Time Series Design