If total volume, instead of pieces per capita, were displayed on the vertical axis, then the Y-intercepts would remain unchanged but the cost curves would be parallel.
The Y-intercepts would remain unchanged overall even if the vertical axis had a change in data.
mnli hypothesis: The Y-intercepts would remain unchanged overall even if the vertical axis had a change in data. premise: If total volume, instead of pieces per capita, were displayed on the vertical axis, then the Y-intercepts would remain unchanged but the cost curves would be parallel.