2 - Determining Differentiability Graphically LEARNING OBJECTIVE: Decide the value(s) of x for which ((x) is not differentiable by using graphical properties. For the graph shown below, find all values of x for which /(x) is not differentiable. 6 5 4 3 2 -5 -4 -3 -2 -1 3 5 6 X -1 -3 -4 5 .6O a.) x =4 O b.) x = - 2, x = 1, x =4 O c.) f(x) is differentiable for all x-values. O d.) x = - 2, x = 1