Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
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.
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.
Anodising, Plating, Powder Coating and Galvanising
Anodizing is usually done to give a rust-proof coating to steel.
Anodising is a electrolytic passivation process, used on metals to increase corrosion resistance and for better adhesion of paint. It was first used for industrial purposes in 1923, to protect seaplane parts from corrosion.
Rusting of iron can be prevented by painting,oiling,greasing,galvanising,chrome plating,anodising or making alloys
Hard anodizing: electrolytic passivization of the metallic surface with the scope to obtain an oxide layer with a hardness greater than the hardness of the metal. Frequently used for aluminium.
Arthur William Brace has written: 'European bright anodising practice' 'The technology of anodizing aluminium' -- subject(s): Aluminum, Anodic oxidation
Aluminium doesn't rust, ever. But it can corrode, which is similar. Anodising offers some protection, but it's all down to how bad the environment is. Bad enough, and any metal will take damage.
The process of anodizing is used on metal parts. It's uses are manifold. For one it increases the corrosion and wear resistence. But it is also used to apply paint to the metal piece.
The six functions of language are expressive (to express thoughts and feelings), directive (to give commands or requests), informative (to provide information), phatic (to establish social contact), aesthetic (to create beauty or evoke emotions), and metalinguistic (to discuss language itself).
Function
The parent function of the exponential function is ax
The IF function is the main function to do it and you can also use other logical functions, like the AND function, the OR function or the NOT function.