This function Y is called the yield curve, and it is often, but not always, an increasing function of t. Yield curves are used by fixed income analysts, who analyze bonds and related securities, to understand conditions in financial markets and to seek trading opportunities.
Laughing Waters Beach, Ocho Rios, St. Ann, Jamaica (James Bond and Honey Rider meet in the classic scene when Honey walks out of the ocean)
Hooker, High, Triple, and Bridal Veil Falls were all featured in the movie Last of the Mohicans. I've had several emails asking about the cave behind the waterfall - sorry, there is none. Part of that scene was shot behind the small overhang drop at the top of Bridal Veil Falls.