Question: Neo is reviewing a regression model using residplot() and observed a non-random structure in residuals. What does a non-random structure best describe in this scenario?

Neo is reviewing a regression model using residplot() and observed a non-random structure in residuals. What does a non-random structure best describe in this scenario? The model assumptions about the data relationship are invalid. The prediction errors are uniformly low across values. Residuals are randomly distributed around zero. The relationship between variables is linear

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