A simple linear regression, 
,is estimated using cross-sectional data from 10 firms.The resulting residuals e,along with the values of the explanatory variable Advertising (x,in $100s),are shown in the accompanying table. 
a.Graph the residuals e against Advertising (x)and look for any discernible pattern.
B)Which assumption is being violated? Discuss its consequences and suggest a possible remedy.
Definitions:
Heart Disease
A range of conditions affecting the heart, including coronary artery disease, heart rhythm problems, and heart defects.
Emphysema
A chronic lung disease characterized by overdistension of the alveolar sacs and inability to exchange oxygen and carbon dioxide.
Cyanosis
A bluish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood.
Barrel Chest
A chest shape characterized by an increased front-to-back diameter, often associated with emphysema or chronic obstructive pulmonary disease (COPD).
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