The President of the ABC Manufacturing Co. believes that the amount of electrical power used in his plant depends on the outside temperature during the day, and the number of units produced that day.A random sample of 5 days was selected.The power usage (Y, in thousands of kilowatt hours of electricity), the production on that date (X1, in thousands of units), and the temperature (X2, in °F) have been recorded:
| | |
|---|
| 8 | 25 | 75 |
| 9 | 28 | 77 |
| 10 | 28 | 80 |
| 13 | 31 | 81 |
| 13 | 33 | 82 |
