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4-28.

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

Remember the general form of a parabola.

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

  2. A parabola with a stretch factor of , sitting with its vertex on the -axis at .

  3. A downward-opening parabola with vertex  and a vertical compression of .

Type functions for each part in the eTool below. Scroll down in the eTool to check your answers!
Click the link at right for the full version of the eTool:  4-28 HW eTool