Graphs of Selected Parabolas

There are six graphs below, each of a different parabola.  The vertex, zers, and the points 1 unit to the right and to the left of the vertex are indicated by dots.  The scale is 1 unit per gridline in both the x and the y directions.

You should be able to determine the equation of each parabola from its graph.

 wpe6.jpg (7737 bytes)                      wpeB.jpg (8082 bytes)wpeC.jpg (7742 bytes)                       wpeD.jpg (7113 bytes)wpeE.jpg (8058 bytes)                           wpeF.jpg (7219 bytes)