To find the equation, I scanned the Golden Arches from a placemat that I found at McDonald's tonight. I took the scanned picture and imported it into GeoGebra. I picked five points on the outside of one arch, and five points inside of the arch. The picture is below.
|Ten points through the Golden Arch|
|The parabola through the points on the outside of the arch|
|The parabola through the points on the inside of the arch.|
|Ellipses work well to model the arches|