Question 151144: Is it safe to assume that linear equations do not have a domain? Why or why not?
Answer by mducky2(62)   (Show Source):
You can put this solution on YOUR website! It is not safe to assume that linear equations have a domain! The domain is the range of numbers which x can equal. There are two different domains that linear equations can have.
Although linear equations are always shaped as a line, usually giving an infinite range of x, there is one exception. If the equation is x=1, x=2, and so on, x can only be one number, and therefore the domain only contains one number.
However, even when the x is not a constant, the domain of all other linear equations is (-infinity, infinity), since x can be any number.
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