Adam and Edwin spend a certain amount of money from their money box each month to buy plants. The table shows the relationship b
etween the amount of money (y) remaining in Adam's money box and the number of months (x): Function 1: Number of Months (x) Amount Remaining (dollars) (y) 1 90 2 83 3 76 4 69 The equation shows the relationship between the amount of money, y, remaining in Edwin's money box and the number of months, x: Function 2: y = –9x + 90 Which statement explains which function shows a greater rate of change? Function 2 shows a greater rate of change, because Edwin spends $90 each month and Adam spends $21 each month. Function 2 shows a greater rate of change, because Edwin spends $9 each month and Adam spends $7 each month. Function 1 shows a greater rate of change, because Adam spends $21 each month and Edwin spends $81 each month. Function 1 shows a greater rate of change, because Adam spends $7 each month and Edwin spends –$9 each month.
The answer would be choice 2 : Function 2 shows a greater rate of change, because Edwin spends $9 each month and Adam spends $7 each month. I found this out because for Adam, you simply subtract the y-coordinates from each other and get 7 each time. Edwin clearly shows that he Spends $9 each month with the negative sign.