Which type of chart is designed to show the relationship between two selected variables?

A scatter chart is specifically designed to illustrate the relationship between two numerical variables. In such a chart, individual data points are plotted on a two-dimensional axis, where each axis represents one of the variables. This visualization allows for the easy identification of patterns, trends, and correlations between the two variables. For instance, by analyzing the distribution of points, one might observe a positive or negative correlation, or even no correlation at all, which can provide valuable insights for data analysis.

A bullet chart, while useful for displaying performance metrics in relation to a target or threshold, does not show the relationship between two distinct variables. Similarly, a line chart focuses on trends over time using a continuous data set rather than the correlation between two variables. Lastly, a tile bullet chart combines various visualization techniques, but it also does not focus on revealing the relationship between two selected variables like a scatter chart does.