A function is a correspondence between two (2) sets of elements such that with each element in the first set, there corresponds to one and only one element in the second set.
First set of elements = Domain
Second set of elements = Range
How is this related to Business?
We'll give an example on how is this related to business. One example would be, when the students want to photocopy school-related subjects - and they use a printer or either go to computer shops to photocopy - the blank paper to be used will be our supposed input, and the outcome or rather ouput would be the inked-paper.
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| Printed Paper (output) |
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| Blank Paper (Input) |
>>>>>>>>>>>>>
Another example, would be the ATM Machine. A simple input and output can be determined in just a small process when using it. The inserting of the credit card would be the input, after pressing some digits, the cash that was wtihdrew would be the final output.
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| Inserting of Credit Card (Input) |
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| Cash (Output) |
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