This document discusses different types of exchange rate systems and factors that affect exchange rate determination. There are three main types of exchange rate systems: fixed, flexible, and managed float. Under a fixed system, exchange rates are set by central banks, while flexible rates are determined by market forces. A managed float system allows some central bank intervention in currency markets to influence but not fix exchange rates. Exchange rates can appreciate or depreciate depending on demand and supply factors in the foreign exchange market. Key determinants of exchange rates include inflation, interest rates, capital flows, exports and imports.