Find and interpret the given function values and determine an appropriate domain for the function.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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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)=10000+2000x,f(x)=10000+2000x, 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)= 11000, meaning a qualifying applicant with 2 siblings in their household would get $11000 in finaincial aid. This interpretation  makes sensedoes NOT make sense in the context of the problem.
 
f(2)=f(2)= 23000, meaning a qualifying applicant with 4 siblings in their household would get $23000 in finaincial aid. This interpretation  makes sensedoes NOT make sense in the context of the problem.
 
f(1.5)=f(1.5)= , meaning a qualifying applicant with  siblings in their household would get $ in finaincial aid. This interpretation  makes sensedoes NOT make sense in the context of the problem.
 
Based on the observations above, it is clear that an appropriate domain for the function is  all real numbersnon-negative real numbersreal numbers in a≤x≤bintegerswhole numbers (0, 1, 2, ...)positive integers (1, 2, 3, ...)integers in a≤x≤b.
 
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