Final answer:
When explaining a pie chart, highlight the segments, percentages, and their contribution to the total. For bar graphs, emphasize bar height and scale. Ensure the charts are accurately labeled and avoid potential display problems like misleading scales and unclear labels.
Step-by-step explanation:
When explaining the features of a chart, such as a pie chart or bar graph, during an oral presentation, certain aspects should be highlighted to convey information effectively. If you were presenting data graphed in a pie chart, you'd point out segments representing different categories of data, the percentage of each category, and how they contribute to the whole. You'd also ensure the pie chart is accurately labeled and easy to read.
In the context of comparing data from researchers A and B, a pie graph is appropriate when you are depicting the proportions of a whole, whereas a bar graph is more desirable for showing comparisons between distinct categories or over time. The features you'd emphasize on a bar graph include the height of bars, which represent the value of each category, and the uniform chart scale. Avoid potential display problems such as misleading scales or unclear labels. The guidance counselors from De Anza and Foothill might opt for a pie graph to represent proportions, such as the percentage of students enrolled in various programs. If they were showing the number of students over several years or comparing different schools' populations, a bar graph would be more illustrative. Whichever graph is used, the key features, like labels, legends, and scale, should be clear, and common issues like distorted scales or too similar colors should be checked before the presentation.