Answer: The correct option is (B) f(q) = 2q + 3.
Step-by-step explanation: The given equation representing a function is

We are to write the equation in function notation with 'q' as independent variable.
From equation (i), we have

So, 's' can be represented as a function of 'q'. Hence, we can write

Therefore, we have

Thus, (B) is the correct option.