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Range of a function : All the values of y given in the graph where function is defined.
In the given figure, Range can be depicted as :

There's an open interval at 0, because According to graph, 0 is not included in the Range and Closed interval at 7, because 7 is included in the range.
Answered by : ❝ AǫᴜᴀWɪᴢ ❞