If a graph is drawn with net exports oBuilding an economic model based on the assumption of a small open economy is useful because: Group of answer choices it is not possible to build models of large open economies. it accurately describes the U.S. economy. this simplifying assumption can assist our understanding and intuition of open economy macroeconomics. it is more complicated and realistic than a model based on the assumption of a large open economy.n the horizontal axis and the real exchange rate on the vertical axis, then the real exchange rate is determined by the intersection of the ______ net-exports schedule and the ______ line representing saving minus investment. Group of answer choices upward-sloping; vertical downward-sloping; upward-sloping downward-sloping; vertical upward-sloping; downward-sloping