The answer is credit card balance. A credit card balance is the sum of money payable to the credit card company. A new credit card balance may take up to 24 hours to bring up-to-date after a payment has been administered dependent on the Credit Card Company and technique of compensation engaged. The balance can be negative, positive or zero liable on if money is owed if a compensation more than the balance was made or the balance was compensated in complete.
        
                    
             
        
        
        
I think it is the exchange of goods or services, which can be with or without money.
 
        
                    
             
        
        
        
Answer:
Larger-sq and small Se.
Explanation:
 Regression line is a line that clearly describes the behavior of a given set of data.
Regression lines are very essential for forecasting processes. The importance of the line is to describe the interrelation of a dependent variable (Y variable) with one or many independent variables (X variable). 
An analyst can forecast future behaviors of the dependent variable by making use of the equation gotten the regression line. This is done by inputting different values for the independent ones. Regression lines are frequently employed in the financial sector.
Financial analysts make use of linear regressions to forecast stock prices, commodity prices and also to carry out valuations for many different securities. Companies use regressions for the purpose of forecasting sales, inventories and a lot of other variables that are needed for strategy and planning. The regression line formula is represented below:
(Y = a + bX + u)