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)
Fleming was so enamored of Jamaica that he built his own home on the island and spent around 20 winters here. It was during this time that he went from being a writer for British newspapers to gaining international fame for his James Bond stories.