This is correct. GP’s rule should be adhered to for bar charts though. Absolute values there are expected. For line charts continuous (ish) over time, people ar

This is correct. GP’s rule should be adhered to for bar charts though. Absolute values there are expected. For line charts continuous (ish) over time, people are usually more interested in relative change in a time period so ok if y axis starts closer to the minimum value of the series in that range.