How do slope angle and delta y relate to each other

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

Ten times the square of a non-zero number is eqaul to ninety times the number

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64