A regression model was developed relating average annual pay to the percentage of women employed for a sample of companies. Below is the plot of residuals versus predicted values. 
a. What can you see in the plot of residuals that may not have been clear in the original scatterplot of the data?
b. Would a re-expression of the data help? If so, what would you recommend?
Definitions:
Net Profit
The amount of money a company earns after subtracting all expenses, taxes, and costs from its total revenue.
Upside Price Movement
The potential increase in the price of an asset or security from its current level.
Bull Spread
An options strategy aiming to profit from a moderate increase in the price of the underlying asset.
Security Fall
A decrease in the price or value of a security, such as a stock or bond, often influenced by market conditions and investor behavior.
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