In fact, the Arch is the upside-down version of what you would get if you hung a chain by its endpoints.
Some would look at the Gateway Arch, and quickly dismiss it as a parabola. But the equation of a parabola does not describe the Arch. In fact, the Arch is the upside-down version of what you would get if you hung a chain by its endpoints. For ten points, what is the proper term for the shape of the Gateway Arch, a curve that mimics the hyperbolic cosine function?
Some would look at the Gateway Arch, and quickly dismiss it as a parabola.
inverted {catenary} (accept “{hyperbolic cosine} function” before said)