Final answer:
The coordinate of the midpoint of Y0 is -4.
Step-by-step explanation:
The coordinates on a number line of Y and 0 are seven and -15, respectively. To find the coordinate of the midpoint of Y0, we can use the midpoint formula:
Midpoint = (Coordinate of Y + Coordinate of 0) / 2
Substituting the given values:
Midpoint = (7 + (-15)) / 2 = -8/2 = -4
Therefore, the coordinate of the midpoint of Y0 is -4.