Final answer:
A scatter plot is the best type of graph for visualizing correlation or relationships between numerical variables, as it shows patterns that indicate how variables are related. The correct answer is option 3).
Step-by-step explanation:
The type of graph that is great to visualize correlation or relationships between variables is a scatter plot. Scatter plots are ideal for showing the relationship between two numerical variables, displaying points at the intersection of an x and a y axis, which allows for the observation of patterns indicating correlation.
In contrast, a line graph shows the relationship between two variables involving time or sequence, a bar graph illustrates comparisons among discrete categories, and a pie chart is used to show the proportion of parts to a whole. Therefore, when it comes to visualizing correlation
The scatter plot is the best choice as it provides a clear and intuitive presentation of how one variable is associated with another.