Find the curvature 
for 
Definitions:
Direct Investment
In international business, building facilities in another country.
Significant Facilities
Important physical buildings, plants, or other structures owned or used by a business to carry out its operations.
Swiss Franc
The official currency of Switzerland and Liechtenstein, known for its stability and often considered a "safe-haven" currency.
Polish Zloty
The currency of Poland, symbolized as PLN.
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