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.
It is a thirty year-old application. Microsoft Excel is a spreadsheet application launched in 1985 by the leader in software innovation, Microsoft Corporation. Excel is a well-liked spreadsheet system, which sorts out data in columns and rows that can be manipulate through formulas.