The table below shows the cost of different numbers of goldfish at a pet store COST OF GOLDFISH Number of Goldfish 5 10 15 20 Cost 1 50 3 00 4 50 6 00 The cost is a linear function of the number of goldfish Which statement describes the rate change of this action The cost increases 1 50 each time 1 goldfish is added The cost increases 0 30 each time 1 goldfish is added The cost increases 3 00 each time 5 goldfish are added The cost increases 6 00 each time 5 goldfish are added