Using the function specified in the table, it is found that their taxes will be given by:
A. $10,470
How are their taxes determined?
For a coupe filling jointly, with earnings E between $56,800 and $114,649.99, their taxes are modeled according to the following function:
[tex]T(E) = 0.25E - 6380[/tex]
In this problem, the couple filing jointly earns $67,400, hence [tex]E = 67400[/tex], and:
[tex]T(67400) = 0.25(67400) - 6380 = 10470[/tex]
Hence option A is correct.
A similar problem, in which a function also has to be applied, is given at https://brainly.com/question/25537936