Final answer:
If the case mix of patients seen by a physician increases in severity, the production relationship would increase.
Step-by-step explanation:
If the case mix of patients seen by a physician increases in severity, the production relationship would increase. A case mix refers to the variety of patients seen by a physician, and severity refers to the seriousness of the conditions they have. When the case mix increases in severity, it means that the physician is treating more severe cases, which typically require more resources, time, and effort to manage. Therefore, the production relationship would increase because the physician would need to provide more services and treatment for these patients.