A property whose value doesn't depend on the path taken to reach that specific value is known to as state functions or point functions. State functions are the values which depend on the state of the substance like temperature, pressure or the amount or type of the substance, as a matter of fact, state functions do not depend on how the state was reached or established.

Among the given functions Internal energy, enthalpy, volume,  are the state functions.

The state of a thermodynamic system is described by its  macroscopic properties.