A connected scatter chart joins the points of a scatter plot in time order, so one view shows how two measures relate and how that relationship has shifted. Yehwan Hwang uses Hannah Fairfield's New York Times graphic on miles driven against road deaths to show why it beats two separate line charts: the line bends back on itself during the 1970s energy crises and the 2008 recession. He then gives the reading rules, what each direction and slope means, and the Tableau build. Because audiences see this chart less often, Yehwan is careful about when to use it and how to annotate it.