You can put this solution on YOUR website! Domain: Set of all real numbers BUT x cannot equal 0. This is to avoid division by zero errors.
Range: Set of all real numbers BUT y cannot equal 0. Why not? Because there is no way to get 9/x equal to 0. The denominator can't be 0. And 9 is always 9. So again, 9/x = 0 has no solutions.
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