The graph of a direct relationship is very distinctive. If a graph is a straight line with a positive slope AND goes through the point (0, 0), then the relationship is direct. Definition: A quantity y is directly proportional to a quantity x if y = kx for some k > 0. k is called the constant of proportionality and this can be represented through a graph as shown below: Often just the term proportional is used to mean directly proportional.
History of Contiki. Contiki Holidays was founded in 1961 by John Anderson of New Zealand. The Contiki Tours began in London , and the first guided tours were booked by 19-29 year olds. Since Contiki Travel was established, it has become a worldwide leader in vacation for 18-35 year olds.
CITI is the most effective and comprehensive training program for the ethical conduct of research. As of October 2007, more than 830 institutions around the world utilize the CITI program. Investigators can log in to the system at their leisure and complete the training at their own pace.he Collaborative Institutional Training Initiative (CITI), founded in March 2000, was developed in collaboration with the University of Miami to provide a Web-based training program in human research participantsâ protection.