Why is the isoquant curve down sloping?

When a city suddenly grows larger it is said to do what? What is propotion? What is one example of how the global integration of cultures has impacted contemporary philosophical thinking? What are 4 major characteristics of capitalism? Why do companies go out of business? How did estuary at the mouth of the thames help London become a center of trade? Is Bulgaria a developed country or a developing country? What involves the direct exchange of goods and services without the use of money as a medium of exchange? Did the Roman money barter and how did they trade it? What is the advantages of hiya? Is market capitalization the same as market value? How much US currency circulates in foreign countries? How did Charles Edward Russell feel about capitalism? Monopolistic competition occurs where A. there are relatively few sellers competing. B. a single seller dominates trade. C. a large number of buyers and sellers exchange relatively well-differentia? How can surplus recycling be effectively implemented to reduce waste and promote sustainability? How does elasticity of demand affect taxes in a market? What person or organization will usually supply goods and services when it appears that the benefits to society outweigh the costs to society? What is seigniorage? In economics the word scarcity relates to what? What is scarcity in an economic sense?