Function or not a function?

i just need a simple yes or no! ;-;

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list