Anna is 9 years old, and this year she received $10 from her aunt on her birthday. Her aunt has told
her that she will send $10 every birthday from now on. Which function best describes how much
money, M, Anna will have received from her aunt, in total, given how many years, y, have passed
since her 9th birthday?
O M(y) = 10y
OM(y) = 10y + 10
O M(y) = 10y - 10
M(y) = y + 10