The ordered pair (15, 0) is located on the positive x-axis. In the Cartesian coordinate system, the x-axis and y-axis divide the plane into four quadrants:
- Quadrant I: (x > 0, y > 0)
- Quadrant II: (x < 0, y > 0)
- Quadrant III: (x < 0, y < 0)
- Quadrant IV: (x > 0, y < 0)
Since the ordered pair (15, 0) has a positive x-coordinate and a y-coordinate of zero, it does not belong to any of the quadrants. Instead, it is classified as being on the x-axis.