A college has a financial aid formula that applies to applicants whose family's income is below a certain threshold. The financial aid can be determined by the...

A college has a financial aid formula that applies to applicants whose family's income is below a certain threshold. The financial aid can be determined by the function f(x)=25000+5000x,f(x)=25000+5000x, where xx is the number of siblings (including half siblings and step siblings) that the applicant has living in their household. Find and interpret the given function values and determine an appropriate domain for the function.

f(-3)

f(3)

f(1.5)

Based on the observations above, it is clear that an appropriate domain for the function is