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.
PowerPoint was created by Robert Gaskins, who originally designed PowerPoint for Mac. However, Microsoft later acquired the app and made it a part of its Office suite. If you are thinking about what PowerPoint is used for, then you must be a newbie. But fret not, we will guide you through its purpose and uses.