declutter a dual y-axis chart
Have you ever felt overwhelmed when you open an overflowing, unorganized closet or enter a crowded room? It’s a common reaction when you receive too much visual input at once. We often experience this same uncomfortable feeling when presented with too much information in a graph.
Consider the following dual y-axis chart and take note of how it makes you feel.
You may be confused and overwhelmed at first. Dual-axis graphs like this are inherently challenging. Whether you call them dual-axis graphs, combo charts, or secondary y-axis graphs, they always demand extra effort from a reader to figure out which data series to read against which vertical axis.