How do you find the range of a function?

To find the range of a function, you should focus on identifying all the possible output values, which are referred to as y-values, that the function can produce. This involves analyzing how the function behaves over its entire domain (the set of all possible input values) and determining what values can be obtained as outputs.

For example, if you have a function that takes a variety of input values, you would evaluate the function at those inputs to see the resulting outputs. The range will consist of all those unique y-values that are reached. In mathematical terms, the range gives insight into the behavior of the function and is crucial for understanding its graphical representation.

Considering the other options, focusing solely on input values does not provide the needed information about outputs. Maintaining a constant output does not apply to most functions, as most vary with different inputs. Listing defined values is related to the domain rather than capturing the full spectrum of outputs. Therefore, determining the set of all possible output values directly addresses the concept of range effectively.