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Determine Whether the Relation Is Also a Function $3 \rightarrow 6$

Question 263

Multiple Choice

Determine whether the relation is also a function.
-twice a number $3 \rightarrow 6$
$8 \rightarrow 16$
$13 \rightarrow 26$
$18 \rightarrow 36$

A) Function
B) Not a function

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