Using focus-directrix graph paper, create a parabola that has a horizontal directrix that is six units below the focus. You can get focus-directrix paper on the Lesson 12.1.4 Resource Page available at cpm.org. 12-66 HW eTool (Desmos).
You could also use the eTool below to create the parabola. Be sure to read the instructions.
Click the link at the right for the full eTool version: CCG 12-66 HW eTool