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:Proportional tax is a tax whose?The relationship between the tax rate and income…If tax takes a large proportion of the income of…The time rate of loss of heat by a body is…A tax system in which the rich pays a higher…