Marginal tax rates Partner A, a single taxpayer, is one of two partners in a small business. As such, she receives pass-through income that is taxed at her personal tax rates. After all adjustments and deductions have been made, including the 20% qualified business income deduction, she is preparing to calculate her taxes owed for the year. Using the tax rate schedule given here

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, perform the following:

a. Find the marginal tax rate for the following levels of sole proprietorship earnings before taxes:

$ 14 comma 700$14,700;

$ 58 comma 600$58,600;

$ 89 comma 800$89,800;

$ 145 comma 000$145,000;

$ 248 comma 000$248,000;

$ 445 comma 000$445,000;

and

$ 1.4$1.4

million.

b. Plot the marginal tax rates (measured on the

y-axis)

against the pretax income levels (measured on the

x-axis).

Explain the relationship between these variables.