the answer is
(C) The intervals on one axis do not need to be of equal size.
The incorrect statement is The intervals on one axis do not need to be of equal size.
A histogram is a display of statistical information that uses rectangles to show the frequency of data items in successive numerical intervals of equal size.
Properties:
A Histogram is used to display continuous data in a categorical form.
In a Histogram, there are no gaps between the bars, unlike a bar graph.
The width of the bins is equal.
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