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Determine if the equation specifies a function with independent variable x . If it does, find the domain. If it does not, find a value

Determine if the equation specifies a function with independent variable x. If it does, find the domain. If it does not, find a value of x to which there corresponds more than one value of y.
x2y2=81
Does the equation specify a function with independent value x?
Yes
No
Based on your answer above, provide either the domain of the function or a value of x lo which there corresponds more than one value of y .
A. A counterexample is x=9.
B. A counterexample is x=0.
C. A counterexample is x=11.
D. The domain of the function above is all real numbers.
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Determine if the equation specifies a function

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