Quadratic in Vertex Form (or Turning Point Form)
Expressing a quadratic in vertex form (or turning point form) lets you see it as a dilation and/or translation of . A quadratic in standard form can be expressed in vertex form by completing the square.
Based on Stephen Wolfram's Demonstration "Annotated Quadratic Polynomial".
 Wikipedia. "Quadratic Function." (Nov 28, 2011) en.wikipedia.org/wiki/Quadratic_function.