Which of the following relations is a function? A. (5, 10), (-9, 3), (-1, 8), (-1,-6)
B. (10,5), (3, -9), (8,-1), (10,-6)
C. (-1, 10),(-9, 3), (-1, 8), (-9,-6)
D. (5, 10).(-9,3), (-1,8), (-6, 10)

I dont know if this is multiple choice but A and D are functions

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,