Finding the multiple regression line(curve) by hand is difficult and very time consuming so we will give you the formula for two variables in order for you to be able to calculate the line in our example.
| Temperature (F) | Water Consumption (ounces) | Time mowing the grass (hours) |
| 75 | 16 | 1.85 |
| 83 | 20 | 1.25 |
| 85 | 25 | 1.5 |
| 85 | 27 | 1.75 |
| 92 | 32 | 1.15 |
| 97 | 48 | 1.75 |
| 99 | 48 | 1.6 |
Learn the Procedure for calculating the regression equation
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