These definitely are inflection points. Just so we get the exact coordinates, let's figure out what f of 3 is, or f of positive and negative 3. Then we're ready to graph. First of all, we know that the point 0,3.29, that this was a minimum. Because 0 is a critical point, the slope is 0 there. Because it's concave upwards, all around 0. So 0 is definitely not an inflection point.