Yes, but all relations are not functions.
No.
No.
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.
Functions are special types of relations.
cleanses the blood
Yes, but all relations are not functions.
Yes. The set of functions is a subset of the set of relations.
I assume you mean "relation". By definition, all functions are relations; but only some relations are functions.
inverse function
Yes. The set of functions is a subset of the set of relations.