http://faculty.chemeketa.edu/afrank1/topo_maps/scale.htm use this website and i think this should fully explain it
Japan's preferential system of tariffs grants lower or duty-free rates to products imported from developing countries. ... Japan Customs can provide advance rulings on tariff classification and duty rates.
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
Hmmm... are you sure you typed the question exactly? the answer should be y= x/3 - 2/3
Fertile soil and mild climate!