Using proportions, it is found that your taxable income for this year is given by:
d. $37,735
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
In this problem, we have that $6,414.95 is 17% of his taxable income, hence it is given by:
T = 6414.95/0.17 = $37,735.
Which means that option D is correct.
More can be learned about proportions at https://brainly.com/question/24372153
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