The conclusion is best supported evidence is A: There is evidence of a linear association between solubility and temperature. Therefore , A: There is evidence of a linear association between solubility and temperature is correct .
The graph shows that the solubility of potassium nitrate increases linearly with temperature. This means that there is a positive correlation between solubility and temperature.
Therefore, the best conclusion that is supported by the evidence is that there is evidence of a linear association between solubility and temperature.
The other options are not supported by the evidence:
Option B is incorrect because the graph does not show any evidence of a non-linear association between solubility and temperature.
Option C is incorrect because the graph does not show that the solubility of potassium nitrate decreases with temperature.
Option D is a general statement about the relationship between solubility and temperature, but it is not specific to the data shown in the graph.