Please help me

( Will give brainlst )

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

What is not true about kl and mn? what is mn? (show )

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