Time series decomposition seeks to separate the time series $($Y$)$ into $4$ components: trend $($T$),$ cycle $($C$),$ seasonal $($S$),$ and irregular $($I$).$ What is the difference between these components?

The model can be additive or multiplicative. When do you use each?

Review the scatter plot of the exponential trend of the time series data. Do you observe a trend? If so$,$ what type of trend do you observe?

What predictions might you make about the store$$s annual sales over the next few years?