Assume there are no prospective investment projects (I) which will yield an expected rate of return (r) of 25 percent or more, but that there are $5 billion of investment opportunities with an expected rate of return between 20 and 25 percent, an additional $5 billion between 15 and 20 percent, and so on.The investment-demand curve for this economy is: 
Definitions:
Hypothesis
A proposed explanation for a phenomenon, made as a starting point for further investigation, which can then be tested through experimentation or observation.
Elementary School
An educational institution for children that provides the first stage of compulsory education.
Hypothesis
A proposed explanation for a phenomenon, set forth as a basis for further investigation.
Opinion
A personal view, attitude, or appraisal formed about something, not necessarily based on fact or knowledge.
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