Why is the x coordinate undefined in picture 1? It's not undefined anywhere else on the circle and is only undefined when the radius is 4.1... not when the radius is 4.2 or 4.
Please write an answer that makes me understand and not just know.
Please answer, you can take your time, I'm not in a hurry.
(I'll give brainiest)

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.

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the answer to your question is c.)   volcanoes built the mountains and earthquakes tore them down.

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