Which of the following tables does not represent a function?

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

In a rectangle klmn, km = 6x + 16 and ln = 49. find the value of x

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2