Final answer:
Leigh Ann would need to include a legend to identify each bar's color in her bar chart. A legend presents a clear guide to what each color on the chart represents, aiding in the interpretation of the graph. Bar charts effectively compare different quantitative categories by using color-coding and the vertical axis for numerical values.
Step-by-step explanation:
To identify each bar's color on the bar chart she designed, Leigh Ann would need to include a legend. A legend is a key element of a chart that explains what each color or pattern represents, providing clarity to the data visualized. For example, in Leigh Ann's bar chart, the legend would be placed to the right of the chart, with labels next to color samples, denoting what each color bar corresponds to, be it countries or years.
When it comes to constructing different types of graphs such as bar graphs, line graphs, or pie charts, it's important to label axes correctly and represent data graphically with clarity. Bar graphs particularly are adept at comparing size, quantity, rates, distances, and other quantitative categories. They make it easy to see differences between categories at a glance.
Moreover, when representing data using bar charts, the vertical axis will typically showcase a numerical or percentage value. By using different colors for each bar, one can effectively illustrate how different items compare across a given spectrum. To ensure each color can be correctly identified, the legend is essential, because it allows viewers to interpret the data accurately.