Charts and graphs condense high information levels into easy-to understand formats that clearly and effectively communicate important points

Charts and graphs condense high information levels into easy-to understand formats that clearly and effectively communicate important points.
The researcher must think about the purpose of the graph or chart and what they want to present, then decide which variables they want to include, also whether they should be expressed as frequencies, percentages, or categories.
Researchers should consider what type of data they are working with. Categorical data is grouped into non-overlapping categories (such as grade, race, and yes or no responses).
Line graphs, bar charts and pie charts are useful for displaying categorical data. Bar Graphs are composed of discrete bars that represent various categories of data.
The height or length of the bar is equal to the quantity within that category of data. These are best used to compare values across categories. The x-axis is the horizontal part of the graph and the y-axis is the vertical part.