A 2D graph is a visual representation of data on a two-dimensional plane, typically using an x-axis (horizontal) and a y-axis (vertical). Each point on the graph corresponds to a pair of values, allowing for the analysis of relationships between two variables. Common types of 2D graphs include line graphs, bar graphs, and scatter plots. These graphs are widely used in various fields, such as mathematics, science, and economics, to illustrate trends, patterns, and correlations. By plotting data points, a 2D graph helps in understanding complex information in a more accessible way, making it easier to draw conclusions and make decisions.