While training, apprentices and vocational trainees earn no less than the higher of the minimum wage and the industry's prevailing wage for regular workers, and get every benefit the law mandates; if local law permits a lower apprentice rate, it can be used only for the first 30 days and only where that period is spent chiefly on training, not production.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.