Establish a rectangular coordinate system xOy with the midpoint of the arch bottom as the origin o.

Then the parabola has a downward opening, and the vertex is (0, 192), which intersects with the X axis.

A(-96，0)、B(96，0)

Let its analytical formula be y=ax? + 192

Bring (96,0) into

a=- 192÷96？ =- 1/48

So the second resolution function is

y=(- 1/48)x？ + 192