Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
Jim Bouton's birth name is Bouton, James Alan.
Jim Bouton is 6'.
Daniel Bouton was born in 1950.
Georges Bouton was born in 1847.
Georges Bouton died in 1938.
The population of Linières-Bouton is 96.
The population of Villers-Bouton is 149.
Raphaël Bouton was born in 1969.
Maurice Bouton died in 1965.
Maurice Bouton was born in 1892.
Daniel Bouton was born in Paris in France.
Jim Bouton was born on March 8, 1939.