You Have Performed a Linear Regression to Assess the Relationship

You have performed a linear regression to assess the relationship between CD4+ cell counts (y) and viral load (x). Plotting your residuals, you realize that there is a fan pattern. The residuals are clustered more tightly together around 0 for the small values of y-hat and become more spread out as you increase the values of y-hat. Provide the assumptions to the linear regression and provide at least one solution to fixing this problem.