Final answer:
A state function is a property of a system that depends on only its present state, not its history. It is determined by the system's temperature and pressure.
Step-by-step explanation:
A state function is a property of a system that depends on only its present state, not its history. Temperature, pressure, volume, and potential energy are all examples of state functions. These properties are determined by the system's temperature and pressure, making option 1) temperature and pressure the correct answer. For example, the temperature of an oven remains the same regardless of how it reached that temperature, and the pressure in a tire remains constant regardless of how air was pumped into it.