Concavity:This refers to whether a graph is opening upwards like a "U" shape (concave up) or downwards like an "n" shape (concave down).
Second Derivative Test:The Second Derivative Test helps determine if critical points correspond to local maxima, local minima, or neither.
Higher Order Derivatives: These are derivatives obtained by differentiating multiple times. For example, the second derivative is obtained by differentiating twice.