For the following function, a) determine whether it is one-to-one; b) if it is one-to-one, find its inverse function. f(x)=x+9 Is the given function a one-to-one function? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. Yes, the function is one-to-one. The inverse function is f(x) = (Simplify your answer.) B. No, the the function is not one-to-one.