Use derivatives to determine whether f is increasing or decreasing on the given interval Use L4 or R4 whichever is appropriate to give an overestimate of the signed area on the given interval f x 9e on 0 1 get Is the function increasing or decreasing over the interval OA The function is decreasing because f x 0 over the interval OB The function is increasing because f x 0 over the interval OC The function is decreasing because f x 0 over the interval O D The function is increasing because f x 0 over the interval