The table below shows three different proposed tax systems (XXX, YYY, and ZZZ) and the annual amount of tax paid by households at different income levels.
| Household Income (£) | Tax X (£) | Tax Y (£) | Tax Z (£) |
|---|---|---|---|
| 25,000 | 5,000 | 2,500 | 3,750 |
| 50,000 | 8,000 | 6,000 | 7,500 |
| 100,000 | 12,000 | 15,000 | 15,000 |
Which one of the following statements is correct?
Tax X is a proportional tax and Tax Y is a progressive tax
Tax Y is a regressive tax and Tax Z is a proportional tax
Tax X is a regressive tax and Tax Y is a progressive tax
Tax X is a progressive tax and Tax Z is a regressive tax