**Answer:**

*There are 6 types of charts below: *

**Form 1: Drawing a circle chart**

– To draw a circle chart, you must calculate the radius and structure Recognizing this type of chart is when the question at the beginning of the article is “Draw the most appropriate chart to show the scale of the structure of a certain factor” and the data in the beginning of the article must be natural numbers and have The number of years is less than or equal to 3 years. When drawing a chart, draw a circle for each year with the calculated radius and process the data to calculate the structure as a percentage.

– Draw circle chart but not calculating scale and radius. How to recognize this form: When asked at the beginning of the lesson, “Draw the most appropriate chart for the structure of a certain element and at the same time the data in the beginning of the lesson must be are relative numbers (in percent) and the number of years is also less than or equal to 3 years. In this case, although the data is not processed to calculate the radius and structure, it must be drawn every year. A circle has a gradually larger radius to show the development situation close to the reality of the economy.

**Form 2: Draw a chart showing the growth rate of an industry production**

When you encounter this type of chart, you must read the question carefully. If the beginning of the article asks “Draw the most appropriate chart to show the growth of a certain manufacturing industry, then you must definitely process all the data into percentages by setting the first year’s figures equal to 100.” Then take the next year’s figures and divide them by the first year and multiply by 100%. When drawing, you need to draw the vertical axis and horizontal axis. The vertical axis fills in the unit of percentage, the horizontal axis fills in the number of years and based on the processed data, draw a graph of the same line starting from the 100% position.

**Format 3: Drawing a graph shows the development situation of some economic sectors**

In the form of the beginning of the article, the data are natural numbers, the number of years is greater than or equal to 4 years and the figures in the beginning of the article There must be 2 different units. If you encounter this type, you must definitely draw a chart combining a column chart and a line chart with 2 vertical axes (a column chart can be a single column if there is only one indicator in the beginning of the article. It can be a compound column if For example, in the beginning of the article there are 2 indicators with the same unit or it can be an overlapping column if in the beginning of the article there are 2 indicators with the same unit but 1 indicator is in another indicator). As for an indicator with a different unit (second), it is shown with a line chart.

**Format 4: Draw a chart showing the development of a manufacturing industry**

When encountering this type of chart, you must read the beginning of the article carefully: if the beginning of the article gives the data, let the data be natural numbers with a number of years less than or equal to 3 years with the figures in The beginning of the article can be 1 unit or 2 different units and if you want to draw the most appropriate chart to show the development of an economic sector or a certain value, you must definitely draw a bar chart ( or compound columns or overlapping columns depending on the structure of the data in the beginning of the article).

**Form 5: Draw a domain chart**

When encountering the form For this chart, the given beginning of the article can be natural data or data that has been processed into percentages with the number of years must be greater than or equal to 4 years and require drawing the most appropriate chart to show the change ( shift or change…) of a certain economic sector, you definitely have to draw a domain chart.

When drawing this chart, if the data is a natural number, you definitely have to process the data to Convert to a percentage by adding the total for each year and calculating the percentage for each year. Then draw a region chart by drawing the horizontal axis on the vertical axis, rounding 100% on the horizontal axis according to the number of years in the beginning of the article with different distances corresponding to the number of years in each period. Then draw sequentially in the domain to determine the criteria according to the data processed over the years.

**Format 6: Draw an upside-down bowl diagram**

< p>When encountering this type of chart, you must read the beginning of the article carefully. If in the beginning of the article there are numbers that are natural numbers and there are years in the beginning of the article, either 2 years or 4 years and the structure of the data in the beginning of the article for a year must be 2 different components.

When the beginning of the article asks “Draw the most appropriate chart of the structural scale of the components”, in this form of the article you must also draw a circle chart like form 1 but the difference is that each year must be drawn. The 2 circles have different radii and 4 circles must be drawn every 2 years. In this case, you should not draw 4 circles but should combine them into 2 pairs of circles and when drawing, cut each circle in half and put the 2 halves together to form a bowl diagram (note that each half of the circle The remaining must correspond to 100%) and make appropriate annotations.

**According to Associate Professor, Dr. Dinh Van Thanh – Department of Geography – University of Natural Sciences – Hanoi National University**

*(Source Hanoi National University)*

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