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A histogram with unequal class widths must use which quantity for bar height so that area stays proportional to frequency?

Class 8Bar Graphs and HistogramsData Handling
  • AFrequency density (frequency / class width)
  • BFrequency only
  • CClass mark
  • DCumulative frequency

Step-by-Step Solution

For unequal widths, height = frequency density = frequency / width, so area = frequency.
Answer: A) Frequency density (frequency / class width)

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