Answers:
The domain represents the possible x values of the graph. You usually have restrictions when the variable appears underneath a root symbol or in the denominator of a fraction. Since you have neither of these, the domain is all real numbers.
In interval notation, (-infinity, infinity)
Note: You would actually write the symbol for infinity.
The range represents the possible y values.
When you have a non-vertical or non-horizontal line, then both the domain and range are all real numbers.
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