Maddy and Caitlin spend a certain amount of money from their money box each month to buy bracelet-making supplies.

Question

The table shows the relationship between the amount of money (y) remaining in Maddy's money box and the number of months (x):

Function 1
Number of Months
(x) Amount Remaining (in dollars)
(y)
1 100
2 80
3 60
4 40
The equation shows the relationship between the amount of money (y) remaining in Caitlin's money box and the number of months (x):

Function 2:
y = −18x + 120

Which statement explains which function shows a greater rate of change? (4 points)

Function 2 shows a greater rate of change, because Maddy spends $20 each month and Caitlin spends $18 each month.

Function 2 shows a greater rate of change, because Maddy spends $100 each month and Caitlin spends $120 each month.

Function 1 shows a greater rate of change, because Maddy spends $20 each month and Caitlin spends −$18 each month.

Function 1 shows a greater rate of change, because Maddy spends $20 each month and Caitlin spends $18 each month.

Answer 1

Function 1 shows a greater rate of change, because Maddy spends $20 each month and Caitlin spends $18 each month.