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Test: Precalculus
1. | Suppose we have the relation |
The relation is a function because every relation is a function, since that's how relations are defined.
The relation is a function because for every , there is only one
such that
holds.
The relation is a function because holds and
also holds.
The relation is not a function because holds but
does not.
The relation is not a function because and
both hold.
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