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Question: Determine whether the relation is a function. Find its domain and range, if it is a function.



A ) It is a function; domain is 3, 5, 7, 9, 11 and range is 1, 2, 3, 4.
B ) It is a function; domain is 0 and range is 3.
C ) It is a function; domain is 0, 1, 2, 3, 4 and range is 3, 5, 7, 9, 11.
D ) It is not a function.

Steps to derive

1 In the given relation, for each input there is exactly one output.

2 So, the relation is a function.

3 The domain of the function is 0, 1, 2, 3, 4.
 [The collection of all input values is the domain.]

4 The range of the function is 3, 5, 7, 9, 11.
 [The collection of all output values is the range.]



Hence the right answer is Option C

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