Posted by shawn on October 08, 2002 at 18:37:53:
ok. i have the points (-4,0) (0,2) (1,-2) (4,-2) (6,2) all plotted on a plane and connected together. i am supposed to graph the derivative of y=f(x) and tell at what values the funtion isn't differentiable. i dont know how to find the derivative of such a crazy graph. i was thinking the points where it isn't differentiable would be the points i listed at the beginning b/c they are corners. right? help quickly please. thanks.