How do you find the domain and range of $y = 2x - 4$ ?

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Answer 1 · 2017-08-09T02:12:05

See a solution process below:

Because there are no restrictions on the value $x$ can be, then the domain of the function is the set of Real numbers: ${RR}$

The function is a linear transformation of $x$ and therefore the domain is also the set of Real numbers: ${RR}$

How do you find the domain and range of y = 2x - 4y = 2x - 4?