The graph of the second derivative f '' of a function f is shown. State the x-coordinates of the inflection points of f.
x= (smaller value)
x= (larger value)
On f(x) graphs, it is where the slope changes from + to -(0, point at which not increasing or decreasing). On f'(x) graphs, it's where there are horizontal tangents (slope =0). So for f"(x) it should be wherever the function crosses the x -axis? Which would be x=1, and x=8?