What are the domain and range of the function f(x) = 3x + 5?

For this case we see that the function is defined for any value of x.
 That is, the function is defined for all real numbers.
 Therefore, the domain of the function is given by
 x that belongs to (- inf, + inf)
 The range of the function is also defined for all reals.
 Therefore, the range of the function is
 y that belongs to (- inf, + inf)
 answer
 Domain: x that belongs to (- inf, + inf)
 Range: y that belongs to (- inf, + inf)

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