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- Using Bar Charts to Display Array Data Graphically - Many programs present data to users in a graphical manner. For example, numeric values are often displayed as bars in a bar chart. In such a chart, longer bars represent proportionally larger numeric values. One simple way to display numeric data graphically is with a bar chart that shows each numeric value as a bar of asterisks (). - Professors often like to examine the distribution of grades on an exam. A professor might graph the number of grades in each of several categories to visualize the grade distribution. - Suppose the grades were 87, 68, 94, 100, 83, 78, 85,91,76 and 87 . There was one grade of 100 , two grades in the 90s, four grades in the 80s, two grades in the 70s, one grade in the 60 s and no grades below 60