To analyze the shape of the graph of it helps to separate the domain into disjoint open intervals whose endpoints A are critical points of f or f'. Inside each interval there are no crit- ical points of for f', so f' and f" cannot change sign inside the interval. B = = (-,A), (A,B), (B,C), (C,D), (D,E), and (E,) C D= = E = = A Consider the function f(x) = 2x6 - 27x4. The x-intercepts occur at x = NOTE: If there are more than one, separate your answers by a comma. There a y-intercept at y To analyze the shape of the graph of f it helps to separate the domain into disjoint open intervals (-,A), (A,B), (B,C), (C,D), (D,E), and (E,) whose endpoints A B C D = E= A