Final answer:
The corresponding element in the range is 36.
Step-by-step explanation:
To find the corresponding element in the range, you need to substitute the value of 6 into the function f(x) = 9x - 18.
So, when x = 6:
f(6) = 9(6) - 18 = 54 - 18 = 36.
Therefore, the corresponding element in the range is 36.