What is the value of k in the linear pair below?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much