Suppose the demand curve and the supply curve in a market are both linear. To begin, there was a $5 tax per unit, and the $5 tax resulted in a deadweight loss of $1,500 . Now, the tax per unit is higher, with the higher tax resulting in a deadweight loss of $6,000 . What is the amount of the new tax per unit?

The new tax per unit is $10 . Doubling the size of the tax quadruples the size of the deadweight loss.