What is the parent function of the graph?

Graphing Square Root Functions. The parent function of the functions of the form f x = x − a + b is f x = x . Note that the domain of f x = x is x ≥ 0 and the range is y ≥ 0 . The graph of f x = x − a + b can be obtained by translating the graph of f x = x to a units to the right and then b units up. Example:
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