Decide whether the given relation defines a function, and give the domain and range. Year (x) 2005 2006 Number of visits (y) (millions) 63.1 60.9 The relation of the number of visits to parks in millions shown to the right. 2007 62.5 2008 61.9 Does the relation define a function? O No V Yes What is the domain? { } (Use a comma to separate answers as needed.)

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.