How to determine the max or min of a quadratic function in vertex form

The video tutorial explains how to rewrite functions to understand transformations, focusing on identifying the vertex in equations. It highlights the importance of recognizing the vertex as H, K and discusses how to determine if a graph has a maximum or minimum based on its direction and reflection about the X-axis.

What does it mean for a vertex to be represented as H, K in a function?

Explain how the reflection of a graph about the X-axis affects its opening direction.