Alex returned all of the $6,000 purchase of equipment to James. The company uses the voucher system. The entry to record this is: 
D) None of these answers is correct.
Definitions:
Income
Money that an individual or business receives, typically in exchange for providing a good or service, or through investing.
Slope
In mathematics, the rate at which a line inclines or declines, indicating the steepness of the line.
Regression Line
A straight line that describes how a response variable Y changes as an explanatory variable X changes, used in linear regression.
Least Squares Regression Line
A straight line that minimizes the sum of the squared differences between the observed values and the values predicted by the line.
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