The function is $\"v\\left$ ,

where $\"t\"$ represents months.

Because the number of months must be non negative number $\"t\\geq$ .

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

Domain of linear function is all real numbers.

All possible values of $\"t\"$ is the domain of the function.

Graph of the function $\"v\\left$ :

$\"\"$

Observe the graph :

The relevant domain of the function all real numbers greater than or equal to zero and less than or equal to $\"36\"$ .

Domain set is $\"\\left$ .