Gemma is creating a histogram based on the table below. Salary RangeNumber of People0 - $19,99940$20,000 - $39,99930$40,000 - $59,99935Which scale can she use for the vertical axis such that the difference in the heights of the bars is maximized?

The bar heights represent 40, 30, and 35 people. A vertical scale from 25 to 40 uses the smallest range that includes all three values, so the differences take up the greatest share of the graph’s height. Therefore, she can use the 25–40 scale.

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