Find the marginal tax rate for the following levels of corporate earnings before taxes: $11,000, $81,600, $304,000, $496,000, $1,300,000, $9/3 million, and $20.4 million
b. B. Plot the average tax rates (measured on the y axis) against the pretax income levels (measured on the x asis). What generalization can be made concerning the relationship between these variables.