It is not enough to describe the oppostite rays only with the statement that they have the same endpoint. Besides the same endpoint opposite rays are characterized with opposite drection. So, the student should answer: VW and VZ are opposite rays because they have the same endpoint and the the opposite direction.
A number that is less that 7.5 can be used as the lesser of the two consecutive integers with the sum greater than 16, but only if the number used was added with one.
