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Domain, range and intercepts

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I have graphed the following function:

f(x,y) = 4-y^2

I am a little confused as to what the domain, range, and xyz-intercepts are. Can you help with that?

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The expert examines domain, range and intercepts.

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Hi, here is the solution...

f(x,y) = 4- y^2

The x intercept is ...

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