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The Domain is the set of all x-values. It is the horizontal line In a Cartesian Plane.

The Range is the set of all y-values. It is the vertical line in a Cartesian Plane.
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Domain - set of all real numbers, that can be substituted in a particular function and would also result to a real number. (also known as the x-variable)

Range - set of all real numbers that were produced from a particular function. (also known as the y-variable or f(x))
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