A consumer goods company has been studying the effect of advertising on total profits. As part of this study, data on advertising expenditures (in thousands of dollars) and total sales (in thousands of dollars) were collected for a 5-month period and are as follows:
110, 1002 115, 2002 17, 802 112, 1202 114, 1502
The first number is advertising expenditures and the second is total sales. Plot the data and compute the correlation coefficient.