In a flexible exchange rate system, the exchange rate is determined by the forces of demand and supply in the foreign exchange market.

The demand for a currency is positively related to its exchange rate. As the demand for a currency increases, its exchange rate appreciates.

The supply of a currency is negatively related to its exchange rate. As the supply of a currency increases, its exchange rate depreciates.

An increase in the demand for a currency leads to an appreciation of its exchange rate.

An increase in the supply of a currency leads to a depreciation of its exchange rate.

There is a positive relationship between interest rates and exchange rates. As interest rates increase, the exchange rate of the currency in which the interest rates are denominated appreciates.

There is a negative relationship between inflation rates and exchange rates. As inflation rates increase, the exchange rate of the currency in which the inflation rates are denominated depreciates.

A trade deficit leads to a depreciation of the exchange rate of the currency of the country with the trade deficit.

A trade surplus leads to an appreciation of the exchange rate of the currency of the country with the trade surplus.

A capital inflow leads to an appreciation of the exchange rate of the currency of the country receiving the capital inflow.

A capital outflow leads to a depreciation of the exchange rate of the currency of the country experiencing the capital outflow.

Central banks play a role in exchange rate determination through their interventions in the foreign exchange market, their setting of interest rates, and their regulation of the money supply.

The purpose of a fixed exchange rate system is to stabilize the exchange rate between two currencies.

A fixed exchange rate system offers reduced uncertainty for businesses and investors, lower transaction costs, and increased trade and investment.

A fixed exchange rate system involves the loss of monetary independence, reduced ability to respond to economic shocks, and increased risk of currency crises.