Which chart feature provides an additional axis to accommodate values with different scales?

• A. Primary Axis
• B. Data Point
• C. Legend
• D. Secondary Axis

Answer: (D)

When you need to display datasets with different scales on the same chart, you can add a second axis. This extra axis, usually on the opposite side of the chart, lets one data series use the primary scale while another uses a different scale on the secondary axis. That way each set of values is shown clearly without one scale forcing the other to fit, making comparisons meaningful. A secondary axis is specifically designed to provide that additional, separate scale, which is why it’s the best fit for accommodating different data ranges. The primary axis is just the main scale already in use, a data point is an individual value, and a legend is simply a set of labels.