Maxine gives each of her 4 cousins 3 cookies per day out of a box of cookies which has 120 cookies. Identify the rate of change (slope) and the initial amount (y-intercept). Write and equation.
y = -12x + 120 y is the number of days and -12 is slope doing down by 12 cookies each day. 120 is y intercept on 0 days and after 10 days graph will end at (10,0)