The domain and the range of the function are all possible values of the x and y, respectively, that function can take.
The range is given by:
[tex]y_{o}= \frac{3}{3} +12 \\ y_{o}=12 \\ \\ y_{e}= \frac{27}{3} +12 \\ y_{e}=21 \\ \\ \boxed {Im=(y\in R \mid 12\leq y \leq 21)}[/tex]
The domain is given by:
[tex]\boxed {D=(x\in R \mid 3\leq y \leq 27)}[/tex]
