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.
<br /> &nbsp;A: <br /> Adam Osborne invented the laptop <br /> There were many engineering refinements to the laptop concept, however .... <br /><br /> The <b>Dynabook</b> concept was created by Alan Kay in 1968, two years before the founding of Xerox PARC.