[Solution Library] Use the sales data given below to determine: The least squares trend line the predicted value for 1982 sales Year Sales (units) Year Sales (units)
Question: Use the sales data given below to determine:
- The least squares trend line
- the predicted value for 1982 sales
| Year | Sales (units) | Year | Sales (units) |
| 1975 | 100 | 1979 | 139 |
| 1976 | 110 | 1980 | 152 |
| 1977 | 122 | 1981 | 164 |
| 1978 | 130 | 1982 | ? |
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