How do i graph the solution of it with those things. also tap the picture to see what i'm trying to graph the solution of and with what i'm talking about.

Which of the following parabolas opens down?

Aplane intersects a pris paralel to the base of the prism. the cross section is a polygon wth eight sides. how many sides does the base of the prism have? a. 10 b. 8 c. 7 d. 9

The tile along the edge of a triangular community pool needs to be replaced? ?