In a position vs. time graph, motion in the negative direction over time is represented by a downward-sloping line segment. Therefore, if we were to re-evaluate your options considering that significant feature is missing, none of the options given directly indicate negative motion.
However, if we only analyze the given options:
- A horizontal line segment indicates no motion (constant position).
- An upward-sloping line segment indicates positive motion (moving away from the starting point).
- A vertical line segment is not a valid representation since it indicates an undefined position change over time (infinite speed).
Unfortunately, none of these answer the question correctly. If we assume that "downward-sloping" was an oversight in the options provided, that would clearly indicate negative motion. Please double-check the available choices for the accurate representation of motion in the negative direction.
If forced to choose the best option based on this list (and assuming downward slope may relate), we would conclude that none accurately represent negative motion.