Regarding the multiple linear regression: I read that the magnitude of the residuals should not increase with the increase of the predicted value; the residual plot should not show a ‘funnel shape’, otherwise heteroscedasticity is present. In contrast, if the magnitude of the residuals stays constant, homoscedasticity is present.
In this residual plot I see that the magnitude of the residuals change with the increase of the predicted value, so does that mean that heteroscedasticity is present? I do not see this typical funnel shape. Can homoscedasticity or heteroscedasticity be derived from this residual plot?