a) Depreciation of domestic currency refer to decrease in the value of domestic currency in terms of foreign currency (here US dollar)
b) Depreciation of domestic currency for me would imply that there is an increase in the domestic currency price to buy one unit of US currency (US dollars) for exmaple, if price of one dollar rises from Rs 55 to Rs 62, it will increase the cost of education in USA (implying more expenditure/burden on my parents).