Let's analyze the data given in the table to determine the correct conclusion.
The table provides the water purity measurements in particles per liter over a period of 5 weeks for two fish tanks, Tank 1 and Tank 2. Tank 1 was heated to [tex]\(88^{\circ}F\)[/tex], and Tank 2 was left at room temperature. The measurements over the weeks are:
[tex]\[
\begin{tabular}{|c|c|c|}
\hline
Week & Water Purity of Tank 1 & Water Purity of Tank 2 \\
\hline
1 & 12.6 & 12.6 \\
\hline
2 & 16.0 & 13.9 \\
\hline
3 & 17.2 & 14.4 \\
\hline
4 & 18.7 & 15.8 \\
\hline
5 & 19.6 & 17.6 \\
\hline
\end{tabular}
\][/tex]
Based on the table, let's evaluate each conclusion option:
1. Fish need 10 mL of water purifier to survive.
- The table does not provide any information about the survival of fish or the necessity of 10 mL of water purifier for their survival. It focuses on the purity levels over time.
2. Fish tanks with purifier become cloudy in heated water.
- This statement is incorrect because the data shows that Tank 1 (heated) maintains higher purity levels compared to Tank 2. The inverse is true, as the heated tank remains clearer.
3. Water purifier can help a fish survive longer.
- While the table shows how purity changes over time, it does not directly discuss the survival of fish. This statement cannot be conclusively supported by the data provided in the table.
4. Water purifier keeps fish tanks clearer for longer.
- Upon analyzing the table, we observe that the water purity in Tank 1 (heated) increases steadily and remains higher than in Tank 2 over the 5 weeks. This observation indicates that the water purifier is effective in maintaining clearer water for a longer period in both tanks, but especially in the heated Tank 1.
Therefore, the correct conclusion based on the table is:
Water purifier keeps fish tanks clearer for longer.
So, the correct multiple-choice answer is:
Water purifier keeps fish tanks clearer for longer.
