Please help me with this!!

answer: the 4 kilogram bag

step-by-step explanation: this is because if you divide the number of kilograms into the total it will tell you how much each individual kilogram would be worth. 2 kilos is 7 and change 3 would be around 6 ish and the 4 kilo would be 4.6 and change and the 5 kilos would be like 4.88

b

step-by-step explanation:

the word superfluous means unnecessary

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

exactly you go it

step-by-step explanation: