ACT (Enhanced)ScienceEasy
A student measures the time it takes for a ball to roll down ramps of varying angles. They record the following times (in seconds) for ramp angles of 10°, 20°, 30°, and 40°: 3.5, 2.8, 2.2, 1.7. What is the most appropriate conclusion regarding the relationship between ramp angle and rolling time?
- AIncreasing the ramp angle has no effect on the rolling time.
- BAs the ramp angle increases, the rolling time decreases.
- CThe relationship between ramp angle and rolling time is unpredictable.
- DThe rolling time increases proportionally with the ramp angle.
Show answer & explanationAnswer & explanation
Correct answer: B. As the ramp angle increases, the rolling time decreases.
The data clearly shows a consistent decrease in rolling time as the ramp angle increases. This indicates an inverse relationship between the two variables. Options A, C, and D are contradicted by the provided data.
Why the other options are wrong
- A. This is incorrect as the times clearly change with different angles.
- C. The data shows a clear pattern, making the relationship predictable.
- D. This is incorrect; the times are decreasing, not increasing proportionally.
Data Trend Identification
Identifying the general pattern or direction in a set of data points, such as increasing, decreasing, or remaining constant.
- Involves observing changes in dependent variables relative to independent variables.
- Can be linear, non-linear, or show no clear pattern.
- Crucial for drawing initial conclusions from experimental results.
Memory trick: See the flow, know the show.