Use the graph of the function to state the value of 
if it exists. 
Definitions:
Total Investment
The sum of all expenditures on capital goods by businesses and the government within a given period.
Interest Rate
The percentage of a sum of money charged for its use, serving as the cost of borrowing or the return on savings.
Expected Rate
A forecasted value or percentage in various contexts, such as return on investment or growth, based on current and historical data.
Total Investment
The sum of all expenditures on capital goods by a business or economy during a specific period, indicating the total amount spent on investments.
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