When to Use I’ve used this as a way to put together critical numbers, critical points, intervals of increasing and decreasing, points of inflection, and concavity as part of the same problem, resulting in sketching the curve. When I use this resource, I usually do the first curve with the students and have them do the second one on their own. How to Use When I use this resource, I usually do the first curve with the students and have them do the second one on their own, so as more of an i