Puoi aprire il codice e modificare la funzione: vedi l'Help
You can open the Code and modify the function: see the Help

The prices of a hypothetical bus company
Fares in relation to mileage (red graph - descriptive aspects: mathematics for describing the object) and
the continuous piecewise linear function (blue graph - normative aspects: mathematics for building the object)
that reveals the "logic" behind fare definition.