The direction of a correlation is either positive or negative. In a negative correlation, the variables move in inverse, or opposite, directions. In other words, as one variable increases, the other variable decreases. For example, there is a negative correlation between self-esteem and depression. In other words, the higher your self-esteem, the lower your feelings of depression.
Excel Communications was founded in 1988 by Dallas entrepreneur Kenny Troutt as a long distance reseller in the US telecom sector at the birth of telecom deregulation.
In Microsoft Excel, you can create a macro that is called only when a value is entered into a cell in a particular sheet or in any sheet that is currently open. Note, however, that you should not call macros unnecessarily because they slow down the performance of Excel.