### Home > A2C > Chapter Ch4 > Lesson 4.1.2 > Problem 4-28

4-28.

Use what you learned in the parabola investigation to write an equation for each of the parabolas described below. *2-25 HW eTool* (Desmos). Homework Help ✎.

Remember the general form of a parabola.

A parabola opening upward, shifted

units right, and units down. A parabola with a stretch factor of

, sitting with its vertex on the -axis at. 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: *CCA2 2-25 HW eTool*