Exercise 47 Page 75

We are given the graph shown below, relating the time it took a marble to roll down different lengths of slanted boards. We are asked to describe the association.

Let's identify the characteristics of the given association.

• Form: This associations is linear, as we can see that the points are close to being aligned.
• Direction: We can see that this is a positive association, as if one variable increases the other one does as well.
• Strength: Ignoring the point $(0,0)$ which can be considered an outlier, we can see that this is a strong positive association, as the points are close to being aligned.