A marker starts at 5 on a number line drawn with values increasing to the right, then moves 9 units to the left. Which value does it reach?

Explication

Five of the nine steps bring the marker down to zero, and the remaining four carry it past zero onto the negative side. A landing on 4 keeps the size of that position but drops the sign that crossing zero produces, while -14 counts the nine steps away from zero instead of towards it.