Anew self-serve frozen yogurt store opened this summer that sells its yogurt at a price based upon the total weight of the yogurt and its toppings in a dish. each member of isabelle’s family weighed their dish and this is what they found. determine if the cost is proportional to the weight. how much is the unit cost? (unit cost = cost per ounce)

weight (ounces) : 12.5 10 5 8
cost ($) : 5 4 2 3.20