Given:
The function is

Domain of the function is {9, 15, 18, 21, 27}.
To find:
The range of the function.
Solution:
We have,

Domain is set of input (x-values) and range is the set of output (y-values).
Domain = {9, 15, 18, 21, 27}
For x=9,

For x=15,

For x=18,

For x=21,

For x=27,

So, the y-values are 27, 45, 54, 63, 81.
Therefore, the range of the function is {27, 45, 54, 63, 81}.
Note: Options are not in proper form.