A function is a mapping from one set to another such that each element of the first set (the domain) is mapped to one element of the second set (the range).
The same as in any other math class. All functions are relations but all relations are not functions. A function must have only one 'answer' in the range for each value of the domain. Relations are just pairing of numbers with no such restriction on the range.
GetA is a math function and not a string function.
They can have.
Yes, but all relations are not functions.
No.
No.
math
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.
Yes. Functions are always relations, but relations are not always functions.
Function is a special case of relation. It means function is a relation but all relations are not functions. Therefore all functions are relations.
I assume you mean a "relation". All functions are relations, but not all relations are functions.
cleanses the blood