The U.S. dollar is currently trading for 1.10 Australian dollars (AUD) per dollar. If the exchange rate adjusts to 1 Australian dollar per 1 U.S. dollar thenthe AUD has depreciated.the U.S. dollar has appreciated.the U.S. dollar has depreciated.both the AUD and the U.S. dollar have appreciated.both the AUD and the U.S. dollar have depreciated.