It should still be the same point, since the line did not increase in length, but the numbers of units has, and that does not affect the position of the half of the line.
There are an infinite number of fractions equal to 1/2, but the number line in the question has 8 spaces, and shows 1 divided into 8 pieces. Therefore, the answer to this question is likely 4/8.
(may I ask why exactly this is put as a college level problem?)
