The relationship between tax rate and income which is relevant to a proportional tax is depicted by? by Sunday | Mar 29 | Economics JAMB | 0 comments A. curve Z and Y B. curve X C. curve Z D. curve Y Correct Answer: Option D = curve Y Users Also Read These:A tax system which takes lesser percentage of a tax…A tax system in which the rich pays a higher…If tax takes a large proportion of the income of…A tax whose rate increases as income increases is?A tax system in which the income earner pays a fixed…