Final answer:
To determine the domain or range of a discrete function, you will need to list the isolated values.
Step-by-step explanation:
To determine the domain or range of a discrete function (disconnected dots), you will need to list the isolated values. The domain of a discrete function includes all the input values or independent variables, and the range includes all the output values or dependent variables. Identifying asymptotes, plotting a continuous curve, or calculating the limit are not applicable to discrete functions.