Hello guys, Welcome to Africa's Largest Video Search Engine, and you are watching Graphing a parabola in vertex form | Quadratic equations | Algebra I | Khan Academy. and this video is uploaded by Khan Academy at 2013-08-06T14:42:08-07:00. We are just promoting this video only for entertainment and educational purpose only. I hop you like our Video Search Engine. [7QMoNY6FzvM]