A company's quarterly profit (in thousands of dollars) is modeled by a quadratic function of the number of years since the company was founded. The graph of this function is shown. What is the best interpretation of the positive -intercept of the graph?
The company's maximum profit.
The time when the company began to make a profit.
The time when the company's profit was zero after an initial period of profitability.
The initial investment made by the company.
