Intro to Functions Page 3 of 3
Domain and Range of FunctionsThe set of all input values is called the domain of the function. The set of all output values is the range of the function.
In our vending machine example, the domain would be all the codes we entered in and the range would be all the food and drinks that we got out of the vending machine.
If you just have a few values for the domain and range, it's common to use set notation. For the vending machine example, the input codes were D3, D4 and C2. These are the domain values. The output values were pretzels and chips. These are the range values. We can write this with brackets as: Domain = {D3,D4,C2} Range = {pretzels, chips} 

Practice
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Ready to learn more about functions? Check out the lesson on representing functions to see how to use mappings, tables, ordered pairs, and graphs to represent functions.
Ready to learn more about functions? Check out the lesson on representing functions to see how to use mappings, tables, ordered pairs, and graphs to represent functions.