Which of the following is NOT TRUE about a histogram?
A. A vertical rectangle is drawn to represent each class of the frequency distribution
B. A histogram is a graph of a grouped frequency distribution
C. The frequency of a class is represented by the height of its rectangle.
D. Histogram and bar charts look similar but they are constructed very differently.
E. The frequency of a class is represented by the area of the bar corresponding to the class.

Answer: C. The frequency of a class is represented by the height of its rectangle.

Explanation:
In a histogram, the frequency of a class is typically represented by the area of the bar, not just its height. This makes option C the incorrect statement, as it misrepresents how the frequency is visually represented in a histogram.