Final answer:
To plot a graph of temperature of saturation of KNO3 versus concentration, use the average temperature for each concentration point.
Step-by-step explanation:
To plot a graph of temperature of saturation of KNO3 versus concentration, we need to have data for both variables. The question specifies that we should use the average of two trials, so we'll assume we have two sets of data for temperature and concentration. Let's say Trial 1 gives us T1 and C1, and Trial 2 gives us T2 and C2. To plot the graph, we'll use the average temperature for each concentration point, which would be (T1 + T2) / 2. We can plot these average temperatures on the y-axis and the corresponding concentrations on the x-axis.