Graphs of Quadratic Expressions, Vertex Formula and Standard Form

There are many more videos in the same sequence.  This list is a minimum, but please watch more if they are helpful.

1. Finding the vertex and axis of symmetry of a parabola.  Example used is .
2. Forms and features of quadratic functions (8:28)
   Here we see how factoring can be used to find the zeros (-intercepts) and the vertex form reveals the vertex and axis of symmetry using .
3. Practice finding the roots, vertex, and axis of symmetry of a quadratic function.