Final answer:
The equation F = C + 32 does not represent a proportional relationship between C and F because it includes a constant term (32), rather than just a constant coefficient.
Step-by-step explanation:
The equation F = C + 32 relates temperature measured in degrees Celsius, C, to degrees Fahrenheit, F. In this equation, the coefficients for both C and 32 are exact, meaning they represent a fixed and constant relationship. However, the relationship between C and F is not proportional because the equation includes a constant term (32), rather than just a constant coefficient.