They mean whether or not the pillow should be burnt by the aliens who invade the universal studios by the colour purple hat
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A relation is a mapping between two sets, a domain and a range. A function is a relationship which allocates, to each element of the domain, exactly one element of the range although several elements of the domain may be mapped to the same element in the range.
The co-domain or range.
no i dont think so:(
Not every relation is a function. But every function is a relation. Function is just a part of relation.
All functions are relations with the condition that each element of the domain is paired with only one element of the range. A relation is any pairing of numbers from the domain to the range.