The scatter chart below displays the residuals versus the dependent variable, t. Which of the following conclusions can be drawn based upon this scatter chart? 
Definitions:
National Saving
The total amount of savings in a country, consisting of both private savings by households and public savings by the government.
Government Budget Deficit
The financial situation where a government's expenditures exceed its revenues, leading to borrowing or debt accumulation.
Exchange Rate
The exchange rate of one currency to another.
Yen
The official currency of Japan, symbolized as ¥ and known in finance as JPY.
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