Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. f(x) = - 3x - 12x - 23 . . . 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.Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. f(x) = x - 27x +8 . . . 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.The functions f1f6 and x) Q {(x) Q {(x) Q '00 Q foo Q M Q their derivatives 91'96 are shown. Use the f1; ex {2; ex f3; Q graphs shown to the right to match each function fi D\" D\" 4" with its derivative gi. 900 Q 900 Q 900 Q 900 Q 900 Q 900 Q x 91: Q 92: Q 93: Q 94: 9' 95: Q 96: Q D\" 13' 13' 13' I2" I? Fill in the blanks to match each function fi with its derivative gi. f1: V f2: V f3: 7V f4: V f5: V f6: V Find the percentage rate of change of f(x) at the indicated value of x. f(x)= 122 +36x; x=6 The percentage rate of change of f(x) at x = 6 is |:|%. (Type an integer or decimal rounded to the nearest tenth as needed.)