Luna simplifies the expression (2x-+2) correctly. which expression represents luna's result

Which graph represents the following piecewise defined function?

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?

Ined this is due tomorrow and i dont know the answer can you find all the exponents