Question: What patterns do you notice in the time series plot of average annual airfare from 2004 to 2018? A. The time series demonstrates a clear
What patterns do you notice in the time series plot of average annual airfare from 2004 to 2018?
A. The time series demonstrates a clear downward trend.
B. The time series demonstrates a clear upward trend.
C. The time series demonstrates a horizontal pattern.
D.The time series demonstrates clear seasonal effects.

Annual Airfare Revenue 400- 380 - Airefare 360 - Year
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