A histogram titled "20 Busiest North American Airports" has a horizontal axis labeled "Total Passengers (Millions)" and a vertical axis labeled "Frequency" with values from 0 to 10. The histogram has 8 bars. Each bar is associated with a label and an approximate value as listed below. Frequency 10r 8 0 30-39.9 20 Busiest North American Airports 40-49.9 50-59.9 60-69.9 70-79.9 80-89.9 90-99.9 Total Passengers What is the lowest frequency value? (Millions) 100-109.9

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