Consider the following scatterplot of the infected area of a plant versus the time since a pesticide was applied:
What is the approximate value of the correlation between infected area and time since application?

Question

Quizplus · Accepted Answer

Based on the scatterplot, there appears to be a negative, linear relationship between infected area and time since application. As time since application increases, the infected area decreases. Therefore, the correlation between infected area and time since application is negative. The strongest negative correlation is around -0.7, which corresponds to choice B.

Consider the Following Scatterplot of the Infected Area of a Plant