The following are sales revenues for a large utility company for years 1 through 11. Forecast revenue for years 12 through 15. Because we are forecasting four years into the future, you will need to use linear regression as your forecasting method.

1	$4,871.3
2	5,072.7
3	5,520.2
4	5,725.8
5	5,492.0
6	5,198.9
7	5,094.0
8	5,115.4
9	5,555.8
10	5,748.8
11	5,858.7