The statement that best describes the domain of this function is Option(C).
What is a function?
In mathematics, a function is an expression, rule, or law that describes the relationship between one variable (the independent variable) and another variable (the dependent variable).
What is the domain of a function?
The domain of a function is the set of all the function's possible x-values.
According to the definition of domain, when 1 ≤ x ≤ 9, the function is completely defined, hence option(C) is correct.
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