Final answer:
The domain of a function consists of all the possible input values.
Step-by-step explanation:
The domain of a function consists of all the possible input values. The domain represents the set of numbers that you can input into a function to get an output. It is the set of x-values in a function. For example, in the function f(x) = 2x + 3, the domain is all real numbers because you can input any real number as the value of x.