Final answer:
The correct answer is option C. 0.819, indicating a moderate to strong positive correlation between temperature and the number of absences on given days.
Step-by-step explanation:
The correct answer is option C. 0.819
The correlation coefficient measures the strength and direction of the linear relationship between two variables on a scatterplot. The formula for calculating the correlation coefficient (r) involves several steps including finding the sums and the products of the given x (temperature) and y (number of absences) values, their squares, and then combining these values using the Pearson's correlation coefficient formula.
To find the answer, we would calculate the sums: ∑x, ∑y, ∑xy, (∑x)², and (∑y)². Next, we would substitute these values into the formula and calculate r. However, since we're provided with the answer choices and not asked to show the detailed calculation, we need to match our calculated value of r with one of the options given, which is option C with r = 0.819. This result indicates a moderate to strong positive correlation between temperature and number of absences.