Use what you learned in the Parabola Lab to write an equation for each of the parabolas described below.  

1. A parabola opening upward, shifted $7$ units right, and $4$ units down.

2. A parabola that is vertically stretched by a factor of $2$, sitting with its vertex on the $x$-axis at $x = -3$.

3. A downward-opening parabola with vertex ($-5, 2$) and a vertical compression of $0.5$.

   Use the eTool below to complete this problem.
   Click the link at right for the full version of the eTool: INT2 9-16 HW eTool