Question 2.128
2.128 Faculty salaries
Data on the salaries of a sample of professors in a business department at a large university are given below. The salaries are for the academic years 2014–2015 and 2015–2016. 
| 2014–2015 salary ($) |
2015–2016 salary ($) |
2014–2015 salary ($) |
2015–2016 salary ($) |
|---|---|---|---|
| 145,700 | 147,700 | 136,650 | 138,650 |
| 112,700 | 114,660 | 132,160 | 134,150 |
| 109,200 | 111,400 | 74,290 | 76,590 |
| 98,800 | 101,900 | 74,500 | 77,000 |
| 112,000 | 113,000 | 83,000 | 85,400 |
| 111,790 | 113,800 | 141,850 | 143,830 |
| 103,500 | 105,700 | 122,500 | 124,510 |
| 149,000 | 150,900 | 115,100 | 117,100 |
- Construct a scatterplot with the 2015–2016 salaries on the vertical axis and the 2014–2015 salaries on the horizontal axis.
- Comment on the form, direction, and strength of the relationship in your scatterplot.
- What proportion of the variation in 2015–2016 salaries is explained by 2014–2015 salaries?