This is not the answer but I need points 144
0,6(y + 3)= 4,8
6y + 18 =48
6y = 30
y = 5
Let y represent the total weight of mulch and x represent the number of bags of mulch, then
y = kx.
Rate of change (k) = y/x. i.e. the weight of mulch divided by the number of bags.