To determine the correct conclusion about the rider's motion based on the graph, we need to analyze the different time intervals mentioned:
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Between 15 and 20 seconds:
- If the graph indicates a decrease in the vertical position (indicating distance), it suggests that the rider is moving downhill.
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Between 10 and 15 seconds:
- If the graph shows a flat line during this time, it indicates the rider did not move.
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Between 0 and 20 seconds:
- If the graph shows a straight diagonal line from start to end, it means the rider maintained constant speed. Any curvature would suggest a change in speed.
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Between 15 and 20 seconds (slowing down):
- If the graph shows a gradual decrease in distance but not a complete slope downwards, it might indicate that the rider is slowing down rather than moving downhill.
Given that we don't have access to the actual graph, you will need to select the statement that best reflects the data presented in the graph based on these indicators. Please choose the option that aligns with the visual information you're observing on the graph.