Parabola worksheet-identify vertex and whether opening up or down and find x-intercepts.[br][br]For a video explanation, see[br][url]https://www.khanacademy.org/math/algebra/quadratics/solving_graphing_quadratics/v/quadratic-functions-3[/url][br][br]They don't explain finding the vertex in quite the same way we have done it in class.[br]I believe the following video finds the vertex the way we have done it in class.[br][url]https://www.khanacademy.org/math/algebra/quadratics/solving_graphing_quadratics/v/finding-the-vertex-of-a-parabola-example[/url]