Show work please

A 18
B 2
C 9
D 1

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

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?

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd