The word graph means picture, ie a representation of something. Because this question is being asked in the mathematical category, I will keep my answer pertaining to graphs that depict numeric quantities. There are graphs such as the bar graph, pie graph, line graph which are useful for displaying information such as the distribution of funds in a budget, relative productivity of different shifts, and perhaps some quantity over time.
Another kind of graph is the coordinate plane which is somewhat more abstract, but useful nonetheless. I will outline a two-dimensional coordinate plane in this answer. The coordinate plane consists of the space formed by two perpendicular lines commonly labeled the x-axis and y-axis. The x-axis is a horizontal line that goes on forever from negative infinity to positive infinity. Zero is where the x-axis intersects with the y axis
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A graph that uses bars is simply called a bar graph.
Circle Graph
A scale which uses the area of the graph to its maximum.
A line graph or a bar graph.
circle graph