Sociologists investigated whether there is an association between salary and life enjoyment. They administered questionnaires to randomly selected participants who reported their salary in thousands of dollars (salary) and a battery of questionnaire items that probe life enjoyment. The life enjoyment items were collapsed into a continuous-valued composite index of life enjoyment (LE). Given their data (see Table 3 below), is there an association between salary and life enjoyment? If so, how does a change in salary quantitatively relate to a change in life enjoyment? Include a scatterplot of the data and the line of best fit.