No calculator
An industrial site records its electricity use each month. The plot shows values in MWh
Which statement best describes the long-term direction of the plotted values?
The level changes from decreasing to increasing
The overall level decreases
The overall level increases
The overall level is approximately constant
Is there one observation that departs from its nearby values and then returns?
Yes, one observation departs and then returns to the nearby pattern
No, there is no single observation with that pattern
Which description best matches the shorter departures in the plot?
One observation near 2021 Feb departs from the nearby values and then returns
The level changes from 2021 Feb and stays at a new level afterwards
The shorter movements are unsystematic, with no single departure or lasting shift