Summarize the pertinent information

Summarize the pertinent information obtained by applying the graphing strategy and sketch the graph of y = f(x) f(x) = (x-9) (x2 -18x-162) Select the correct choice below and, if necessary, fill in the answer box to complete your choice O The domain of f is (Type your answer in interval notation. Type an exact answer, using radicals as needed. Use a comma to separate answers as needed.) O B. The domain of f is empty