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The process for creating a graphical representation of data using a C program typically involves the following steps:

1. Collect the data: The first step is to collect the data that needs to be graphed. Depending on the application, this data can come from a variety of sources, such as sensors, files, and databases.

2. Choose a graphing library: Next, you need to choose a library that provides functions for graphing. Some popular libraries include OpenGL, SDL, and GTK+.

3. Create a graph container: You will create a container that will hold your graph. This might involve creating a window or other graphics object that will display the graph.

4. Define the axis and scale: Once you have a container, you need to define the axis and scale for your graph. That is, you need to determine how the data will be divided along the x and y axes and what scale they should use.

5. Plot the data: Now, you're ready to plot your data. You will typically use functions provided by your graphing library to draw lines, bars, or scatter plots on the graph.

6. Save or display the graph: Finally, you'll want to save the graph to a file or display it on the screen. Depending on the library you're using, there may be different ways of doing this.

Overall, the process of creating a graphical representation of data using a C program involves a combination of data collection, library selection, container creation, axis and scale definition, data plot design, and graph display or saving.