If Hailey deposited $16 in a savings account that earns 1.8% simple interest, the total saves every month can be calculated as:
Y = $16 + $16*(1.8%)*X
Y = 16 + 0.288X
Where X is the month and Y is the total saving. So, for month 2, 6, and 10, the total saving is going to be:
So, the answer is a graph like: