To analyze the given data and understand what the bars on a bar graph would look like, let's carefully consider each salt concentration level and the corresponding number of contractions per minute recorded:
1. Very high salt concentration:
- Number of contractions per minute: 2
2. High salt concentration:
- Number of contractions per minute: 8
3. Medium salt concentration:
- Number of contractions per minute: 15
4. Low salt concentration:
- Number of contractions per minute: 22
5. Very low salt concentration:
- Number of contractions per minute: 30
To describe how the bars on the bar graph will appear:
- Vertical Axis (Y-axis): This will represent the number of contractions per minute.
- Horizontal Axis (X-axis): This will represent the salt concentration levels, possibly as categorical data points: "Very high," "High," "Medium," "Low," "Very low."
Arrange the data pairs in the bar graph:
- "Very high" on the X-axis will have a bar reaching up to 2 on the Y-axis.
- "High" on the X-axis will have a bar reaching up to 8 on the Y-axis.
- "Medium" on the X-axis will have a bar reaching up to 15 on the Y-axis.
- "Low" on the X-axis will have a bar reaching up to 22 on the Y-axis.
- "Very low" on the X-axis will have a bar reaching up to 30 on the Y-axis.
Observing the Trend:
As one reads from "Very high" to "Very low" salt concentration on the X-axis, the height of the bars increases. This means there is a progressive increase in the number of contractions per minute as the salt concentration outside the paramecium decreases.
Conclusion:
The statement that correctly describes the bars on a bar graph representing the data is:
"The bars on the bar graph representing the data will show an increasing trend of contractions per minute as the salt concentration decreases."
Thus, a correct interpretation of the data indicates that as the external salt concentration diminishes, the paramecium's contraction activity becomes more frequent.
