2. A marketing analyst is studying the relationship between x = amount spent on television advertising and y = increase in sales. The data are reported in thousands of dollars. The following data represent a random sample from the study. x (advertising) 15 28 19 47 10 92 y (sales increase) 340 260 152 413 130 855 a. Draw a scatter diagram. Using the scatter diagram, would you estimate the linear correlation coefficient r to be positive, close to zero, or negative? 4