In the graph provided, the data of general happiness on a scale from one to ten on the y-axis has been put up against year on the x-axis. In this regard, how happy people are on average on any given year is shown from the mid-1960s to 2010. As is readily apparent from looking at the graph, these two variables are in some way related, holding a fairly noticeable correlation line from beginning to end. As the years have gone on, general population happiness of the average person has remained fairly steady, with points of extreme value coinciding with certain historical events of either depression or excess happiness. In much the same way as the Hurtzsprung-Russel Diagram, happiness falls generally upon a main sequence that is a constant level of slightly higher than seven, with some years being outliers of the dataset. This proves that happiness is not a constant, but a varying calculation on the population. However, as data becomes more present and accessible, a slight rise can be seen in the more recent years. Although the data is only over the course of sixty years, this rise may imply that the general happiness of humankind is increasing over time. While this may be true, certain years have more than one set of data, while some have none at all. This lack of a complete set of data could hold important results for level of happiness, showing more outlying years on the data plot.
