Final answer:
To find the federal income tax for Robert based on the given data, we can set up a proportion and solve for x. The federal income tax for Robert last year was $2,475.
Step-by-step explanation:
To find out the federal income tax based on the given data, we can set up a proportion.
Let x represent the federal income tax for Robert. We can set up the proportion as follows:
(Robert's taxable income) / (Robert's federal income tax) = (Ronda's taxable income) / (Ronda's federal income tax)
Substituting the values given:
(24,000 / 1,800) = (33,000 / x)
Cross multiplying, we get:
(24,000)(x) = (33,000)(1,800)
Simplifying:
x = (33,000)(1,800) / 24,000
x = 2,475
Therefore, the federal income tax for Robert was $2,475 last year.