Consider the data on salary (in $) and work experience (in years) of 100 employees in a

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Consider the data on salary (in $) and work experience (in years) of 100 employees in a marketing firm. Estimate the model y = β0 + β1 x + ε, where y is salary and x is work experience.
a. Explain why you would be concerned about changing variability in this application.
b. Use a residual plot to confirm your economic intuition.
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