Final answer:
The mathematical expression that describes the relationship between a job's pay and its job evaluation points is called the production function.
Step-by-step explanation:
The mathematical expression that describes the relationship between a job's pay and its job evaluation points is called the production function. It is a mathematical equation that explains the engineering relationship between inputs and outputs in the context of a job or work setting. In this case, the job evaluation points represent one of the inputs, and the pay is the associated factor payment.