Please help with this question

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

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 final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?