Suppose a tax is such that an individual with an income of $10,000 pays $2000 of tax, a person with an income of $20,000 pays $3000 of tax, a person with an income of $30,000 pays $4000 of tax, and so...

Suppose a tax is such that an individual with an income of $10,000 pays $2000 of tax, a person with an income of $20,000 pays $3000 of tax, a person with an income of $30,000 pays $4000 of tax, and so forth. What is each person’s average tax rate? Is this tax regressive, proportional, or progressive?