! NEED HELP ASAP ! what is the domain of the function below?
(1,3) (2,5) (3,7) (4,9)
***SEE PICTURE***

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

Need solving this 2nd limit problem.

Ineed with 8,9 and 10 love ya guysss