The chart where time intervals are not the same is not correct it is typical example of graph manipulation, 2nd May should be removed from Testing graph, otherwise the chart is giving incorrect message about the speed of testing. See article https://en.wikipedia.org/wiki/Misleading_graph section Improper intervals or units.
 | This is the discussion page for an IP user, identified by the user's IP address. Many IP addresses change periodically, and are often shared by several users. If you are an IP user, you may create an account or log in to avoid future confusion with other IP users. Registering also hides your IP address. |