The table and scatter plot present Ray's monthly electricity bills and the amount of time Ray spent at home from January through August. Table and scatter plot showing hours spent at home and amounts of electricity bills for January through August. The ordered pairs are (240,128), (225,126), (212,115), (264,144), (282,146), (198.108), (234,142), and (254,142). Using the scatter plot, find the correlation coefficient of this data set. The correlation coefficient (r) is . The correlation coefficient can be improved by ignoring the bill for the month of .