Q.Define ‘Foreign Exchange Rate’.

The foreign exchange rate is the price of one currency expressed in terms of another currency. It tells us how many units of the domestic currency must be given up to obtain one unit of a foreign currency, or equivalently, how many units of foreign currency can be purchased with one unit of domestic currency.

For instance, if the exchange rate between the Indian rupee and the US dollar is ₹75 per dollar, it means one US dollar costs ₹75, or one rupee buys $\frac{1}{75}$ of a dollar. This rate is determined in the foreign exchange market through the interaction of demand for and supply of foreign currency. …

The foreign exchange rate is fundamentally a price — but instead of pricing apples or steel, it prices money itself. When you travel abroad or when countries trade goods and services, they need a way to convert one currency into another. The exchange rate is the mechanism that makes this conversion possible.

Think of it this way: if you're an Indian importer buying machinery from the United States, the American seller wants payment in dollars, not rupees. You need to know how many rupees you must surrender to acquire each dollar. That ratio — rupees per dollar — is the exchange rate. It bridges two monetary systems and allows international transactions to happen.

More formally, the foreign exchange rate is the rate at which one country's currency can be exchanged for another country's currency. It can be quoted in two equivalent ways:

• Direct quotation (price quotation): the domestic currency price of one unit of foreign currency. For instance, ₹83 per US dollar means you pay ₹83 to get 1 US dollar.
• Indirect quotation (volume quotation): the foreign currency price of one unit of domestic currency. For example, 0.012 US dollars per rupee means one rupee buys you 0.012 US dollars.

Both convey the same information; they are reciprocals of each other. …