All functions are relations but all relations are not functions.
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Functions are a special kind of binary relation in which no two pairs have the same first element. A binary relation is any set of ordered pairs.
No, a function must be a relation although a relation need not be a functions.
true!
No. A relation is not a special type of function.
This is true. Furthermore, functions can be broken down into one-to-one (each input provides a different output), and onto (all of Y is used when f(x) = y).
True.