The curve representing the regression equation 
= b0 + b1x + b2x2has a U-shape if b2 > 0.
Definitions:
Health Care Disparity
The differences in access, quality, and outcomes of health care among different populations, often influenced by socioeconomic factors, geographic location, and racial or ethnic backgrounds.
Cardiac Patients
Individuals diagnosed with heart-related conditions that affect the structure and function of the heart.
Rheumatoid Arthritis
An autoimmune disorder that causes chronic inflammation of the joints, resulting in pain, swelling, and potential loss of function.
Bundled Payment
A payment model where a single lump sum is paid to cover all services related to a specific treatment or condition over a defined period.
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