How do you decide whether the relation #sqrt(x+40)# defines a function?
1 Answer
Dec 21, 2017
A "function" is any description of related values.
Explanation:
A "function" is any description of related values. The expression given is missing the implied "is equal to..." e.g.
It may or may not be continuous over all real numbers, but that does not define whether it is a function or not.