Ada and Steve spend a certain amount of money from their accounts each week at a pet shelter. The table shows the relationship between the amount of money (y) remaining in Ada's account and the number of weeks (x):

Function 1:

Number of Weeks
(x) Amount Remaining (dollars)
(y)
1 40
2 36
3 32
4 28

The equation shows the relationship between the amount of money, y, remaining in Steve's account and the number of weeks, x:

Function 2:

y = –5x + 40

Which statement explains which function shows a greater rate of change?
Function 1, because Ada spends $4 each week and Steve spends –$5 each week
Function 1, because Ada spends $12 each week and Steve spends $35 each week
Function 2, because Steve spends $5 each week and Ada spends $4 each week
Function 2, because Steve spends $40 each week and Ada spends $12 each week