What number can be replaced with K to make this a function?
(-5,8) (4,9) (K, 9) (9,9)

A)-5
B)4
C)-9
D)9

C
-9 because a function is when an input has only one output
you don’t want to repeat the first numbers in the bracket
and there’s -5, 4 and 9 already so its -9

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,