The Chicago cubs franchise has been in existence since $\"1876\"$ .

The total season attendance for its home games can be modeled by $\"f\\left$ .

Where $\"x\"$ represents the year.

The function $\"f\\left$ is a linear function.

All possible values of $\"x\"$ is domain of a function.

Linear function domain is all real numbers.

Because the number of years must be a whole number, the relevant domain of the function is the set of whole numbers greater than or equal to $\"1876\"$ .

Domain set is $\"\\left$ .