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.
History [edit]. wikiHow was founded by Jack Herrick on January 15, 2005, with the goal of creating an extensive how-to manual with accurate, up-to-date instructions in multiple languages.fter running eHow, Herrick concluded eHowâs business model prevented it from creating the extensive, high quality how-to manual he desired to create. Herrick and Hannah sold eHow in 2006, allowing Herrick to focus on wikiHow full-time.