Math Functions Domain and range

Domain and Range

As you know from the definition of a function each x-value (from the domain) relates to exactly one y-value (from the range).

Domain and Range

Each x-value maps to exactly one y-value. The same y-value can be addressed multiple times.



A function is single valued. For each element x the function will give back a single element y.

The following would not be a valid function, since $x_2$ (from the domain) is connected to two values from the range.

Keine gültige Funktion