Calculate the average rate of change for the graphed sequence from n = 1 to n = 3. (2 points) {(1,2), (2,4),(3,8). (4.16) (5, 32). (6,64)

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?