Inspect the graph of the function to determine whether it is increasing or decreasing on the given interval. f(x) = - 2x - 1 on ( - 00,00) Choose the correct answer below. O A. The function is decreasing on ( - co,co) because its graph is a line with a negative y-intercept. O B. The function is increasing on ( - co,co) because its graph is a line with a negative y-intercept. O C. The function is increasing on ( - co,co) because its graph is a line with negative slope. O D. The function is decreasing on ( - co,co) because its graph is a line with negative slope.X f 15 points Af ( ) -80- 60- 40 20- X -20 -40 60 ur choice. -80- as needed.) OK CUse the given graph of f (x) to find the intervals AT (X) on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. Sketch a possible graph of y = f(x). X Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The function f(x) is increasing on (Type your answer using interval notation. Use a comma to separate answers as needed.) O B. There is no solution.Find the critical numbers, the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. Do not graph. 2 X f(x) = X - 8 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The critical number(s) of the function are x = (Use a comma to separate answers as needed.) O B. There is no solution.A manufacturer incurs the following costs in producing x water ski vests in one day, for 0