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.
Amazon is one of the world's biggest companies, but do you know the slogan? Who founded Amazon? Amazon was founded by Jeff Bezos - who is still the company's CEO. The tech guru, who's a Princeton graduate, was born in New Mexico in 1964. The married dad-of-four has a background in banking, and founded Amazon in 1994 - originally running the company out of his garage in Seattle.