Maddy and caitlin spend a certain amount of money from their money box each month to buy bracelet-making supplies. 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                   amount remaining (in $)(x)                                                           (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? a: function 2 shows a greater rate of change, because maddy spends $20 each month and caitlin spends $18 each month. b: function 2 shows a greater rate of change, because maddy spends $100 each month and caitlin spends $120 each month. c: function 1 shows a greater rate of change, because maddy spends $20 each month and caitlin spends −$18 each month. d: function 1 shows a greater rate of change, because maddy spends $20 each month and caitlin spends $18 each month.