Final answer:
When the exchange rate from Egyptian Pound to US Dollar changes from 10 to 15, the value of the dollar appreciates and the Egyptian Pound depreciates. For other currencies, a weaker dollar makes U.S. exports less expensive as more foreign currency can buy the same amount of dollars.
Step-by-step explanation:
When the exchange rate of the Egyptian Pound for the US Dollar changes from 10 to 15 Egyptian Pounds per Dollar, the value of the dollar appreciates. This is because now you can get more Egyptian Pounds for each Dollar, which means the Dollar has gotten stronger relative to the Egyptian Pound. Conversely, the value of the Egyptian Pound has depreciated, because it now costs more Pounds to buy a single Dollar.
Let's consider an example with a different currency to illustrate this concept further. If the value of the U.S. Dollar weakens against the British Pound, such that the Pound rises to $2.00 per Pound, then the price of a U.S. product, like a Ford pickup, would become less expensive in British Pounds. If the pickup's price is $25,000 and the exchange rate is $2.00 per British Pound, the cost in Pounds would be £12,500. This demonstrates that a weaker dollar means the foreign currency buys more dollars, making U.S. exports appear less expensive internationally.