Grace wanted to save for college. Her parents started an account for her that currently has $325. Grace adds $125 to the account each month. Which number is the changing value? Does this correspond to the m or the b in the y = mx + b equation?
The changing value is the amount of money Grace adds to the account each month, which is $125.
This corresponds to the "m" in the equation y = mx + b, where y is the total amount in the account, x is the number of months, m is the amount Grace adds each month, and b is the initial amount in the account. In this case, m is the changing value of $125.