Homework: HW 12b: First Question 3, 4.1.37-Setup & E Solve HW Score: 0%, 0 of 4 points Derivative Test II Part 2 of 4 Points: 0 of 1 Save Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. f (x) =x +3x+2 Find f'(x) f ( x ) = x + 3x +2 f' (x) = 3x + 3 Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. The function is increasing on (Type your answer in interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.) O B. The function is never increasing