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The least squares regression line is fit between an explanatory variable, @1, and a response variable, y. A plot of the residuals based on the model fit is below. Which of the following statements is true based on the residual plot? O X1 The constant variance, linearity, and normality assumptions required for inference all appear to be met. The constant variance assumption required for inference does not appear to be met. O The linearity assumption required for inference does not appear to be met. O The normality assumption required for inference does not appear to be met