[Calc Review] I dont understand total annualized returns

[Daniel Hargraves]

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Can someone help me understand the last line in the analysis over time chart? in year one it has a negative 10% annualized return and then in year two it says 7%. How is this calculated? I understand finding out ROI. annual cashflow divided by total investment. But i cant figure out how they are coming up with these other percentages at the end of the different years.

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