Use Parabola to Make Quadratic Equatiosn

Use the graph to make equation in following:

1. Factored Form
2. Standard Form
3. Vertex Form

Also embedded assessment /practice can be given for reviewing: zeros, y intercept, axis of symmetry, corresponding point. The second file is analyzed case with some application scenario. The whole scenario is made up. The pictures source are found with Google. I believe the key is to learn to analyze and to make inference with graph and equations.

Revised file edited on 2015 is added for the 4th file (for 1st page)