Final answer:
Both the yen and pound depreciated relative to the U.S. dollar between 1980 and 2000, as indicated by falling exchange rates. Fluctuations in exchange rates highlight the influence on international trade and economic stability, with significant movements observed in the yen/dollar rate from 2002 to 2020.
Step-by-step explanation:
From 1980 to 2000, you've observed that the yen/dollar exchange rate fell from 240 yen/dollar to 102 yen/dollar, and the dollar/pound exchange rate fell from 2.22 dollars/pound to 1.62 dollars/pound. This indicates that the value of both the yen and the pound decreased in relation to the U.S. dollar, meaning it costs fewer dollars to buy one unit of the foreign currencies over time. As such, one could infer that the yen and the pound depreciated relative to the dollar.
When examining the exchange rate movements from 2002 onwards, we see fluctuations that affect international trade and economic stability. For instance, the yen's value dropped significantly in 2013 and again at the end of 2014 by about 14%, followed by an appreciation of roughly 13% from 2016 to 2020. These shifts in exchange rates underscore the volatility and potential impact on global economies.