Ketut is organizing a barbecue for his parents. He knows that 13 of his mom’s friends prefer hot dogs and 9 of his dad’s friends prefer hamburgers. He organizes a two-way table to determine what he needs to buy. Which describes the variables he can use in the first row and first column of his table?
meal choice and number of mom’s friends
meal choice and number of guests
parent and number who prefer hot dogs
parent and meal choice