Final answer:
A graphical representation of data using bars, often in different heights depending on the distribution of numerical data, is called a histogram.
Step-by-step explanation:
A graphical representation of data using bars, often in different heights depending on the distribution of numerical data, is called a histogram. Unlike a pie chart, which is used to show how an overall total is divided into parts, a histogram is used to display the frequency distribution of quantitative data. The bars in a histogram represent the classes of data values, and the heights of the bars correspond to the frequencies of those values.