Hi, above is the plot of residuals against the fitted value of a linear model. I am asked to determine if the assumptions for the linear model hold in this case. I don't think the constant variance for error terms holds in this case because there are some data points that are clustered while others are more spread out. I think the assumption that the mean of the error term is 0 holds because the most data points center around the band that is above and below 0. Are my answers and logic correct? Thanks in advance!