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Question
Identify the mapping diagram that represents a function.
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Solution
If each element in the domain has a unique output in the codomain, the relation is called a function.
The element 9 in the domain has no image in the codomain. Hence, the relation is not a function.
The element 6 in the domain has three different images in the codomain. Thus, the relation is not a function.
The above relation is a function as each element in the domain has a single image in the codomain.
The element 9 in the domain has no image in the codomain. Hence, the relation is not a function.
The element 6 in the domain has three different images in the codomain. Thus, the relation is not a function.
The above relation is a function as each element in the domain has a single image in the codomain.
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