What is the domain of the relation?

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Question

What is the domain of the relation?

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anonymous · Answer

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parthkohli · Answer

$$(\text{domain, range)} $$This is always the form. Here, they have given the following:$$(x, y) $$What do you think?

anonymous · Answer

Domain is a shorthand for what is fully called DOMAIN OF DEFINITION. 
It means x-s where the function IS DEFINED

anonymous · Answer

Okay, I got that. But my answer has to be one of these... & I don't know how to get there

anonymous · Answer

The "unequal" sign means these are FORBIDDEN x-s. Division by what number is forbidden....Now, plugging those numbers (some of them, that is) gives such forbidden division

anonymous · Answer

I get the part where it can't be the number after the unequal sign. But I don't know what numbers to substitute?

anonymous · Answer

Well I substituted in -4 and I got 28/0 and you can't do that, so I eliminated the first two options. Right?

anonymous · Answer

1) division by 0 is forbidden
2) YOH HAVE TO FORBID NUMBERS that give zero in any of the brackets IN THE DENOMINATOR

anonymous · Answer

Oh okay, I gotcha now. & When I put in 7 I got an impossible answer. So I see now. Thanks! :)

anonymous · Answer

Y welcome. Close the qst. pls