Elijah keeps track of when his baby sister’s shoe size increases. He notes that on a certain day her shoe size increases to 6½. Select all the true statements about the relation Elijah observes between his sister’s age, in days, and her shoe size. Group of answer choices

The relation is not a function.

The domain and range are restricted to positive numbers.

The domain of the relation is continuous.

The domain and range are restricted to positive integers.

The domain of the relation is discrete.