Income and Attractiveness Narrative
In order to determine whether good looks translate into heftier paycheques, an economist collected the data shown below on annual income of doctors (y) in thousands of dollars and attractiveness (x) as recorded on a scale from 1 to 5, based on a panel's rating of head-and-shoulder photographs.
-Refer to Income and Attractiveness Narrative. The plot of residuals versus the fitted values is shown below. Does it appear that the constant variance regression assumption has been violated? Explain.

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Income and Attractiveness Narrative
In order to determine whether good looks translate into heftier paycheques, an economist collected the data shown below on annual income of doctors (y) in thousands of dollars and attractiveness (x) as recorded on a scale from 1 to 5, based on a panel's rating of head-and-shoulder photographs.  
-Refer to Income and Attractiveness Narrative. The plot of residuals versus the fitted values is shown below. Does it appear that the constant variance regression assumption has been violated? Explain.

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The Answer of Income and Attractiveness Narrative
In order to determine whether good looks translate into heftier paycheques, an economist collected the data shown below on annual income of doctors (y) in thousands of dollars and attractiveness (x) as recorded on a scale from 1 to 5, based on a panel's rating of head-and-shoulder photographs.  
-Refer to Income and Attractiveness Narrative. The plot of residuals versus the fitted values is shown below. Does it appear that the constant variance regression assumption has been violated? Explain.