The correlation coefficient, denoted by r, is a measure of the strength of the straight-line or linear relationship between two variables. The correlation coefficient takes on values ranging between +1 and -1. The following points are the accepted guidelines for interpreting the correlation coefficient: 1  0 indicates no linear relationship. + 2 1 indicates a perfect positive linear relationship: as one variable increases in its values, the other variable also increases in its values via an exact linear rule.
eBay Inc. is an American multinational corporation and e-commerce company, providing consumer to consumer & business to consumer sales services via Internet. It is headquartered in San Jose, California. eBay was founded by Pierre Omidyar in 1995, and became a notable success story of the dot-com bubble.
And, multiple people may have been involved in the invention of Tang. One of them is William Bruce James, a chemist who worked for General Foods. He also invented several Jell-O flavors. Another person who was involved with the invention of Tang is William A. Mitchell, who also invented Pop Rocks. William Mitchell has been involved with around 70 patents. These two seem to be the key people involved in the invention of Tang, according to the available information.