Please help, I don’t know how to do this

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Factor the polynomial expression x6 – x3 – 20