To accurately assess the rider's motion based on the graph you mentioned, I would need to see the graph itself. However, based on the conclusions provided, I can help you analyze each statement generally:
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The rider slowed down during the time period between 15 and 20 seconds. - This could be true if the slope of the graph decreases in that time interval, indicating a reduction in speed.
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The rider maintained a constant speed during the time period between 0 and 20 seconds. - This would be true if the line on the graph is linear and straight within that time range, showing no change in position over time.
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The rider did not move during the time period between 10 and 15 seconds. - This would be true if the graph is flat (horizontal line) in that segment, indicating that the position did not change.
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The rider rode downhill during the time period between 15 and 20 seconds. - This would be true if the graph shows a negative slope, indicating a decrease in position over time.
Based on typical interpretations of motion graphs:
- A flat line indicates no movement.
- A sloped line indicates motion, with the steepness indicating speed.
- A downward slope indicates descending motion (downhill).
You can confirm which conclusion is valid by checking the graph for these characteristics. If you provide the graph or its details, I can offer a more precise conclusion.