Function:

① Bar chart: Sort it out first, and draw as many as there are.

(2) Discount statistics chart: used to indicate the increase or decrease of quantity.

(3) Fan chart: Fan chart is used to indicate the number of each part in the total.

Production method:

(1) pie chart:

1

By knowing the first unit, calculate the percentage (score) of each area of the first unit.

2

If the first unit is unknown, the first unit should be found.

three

Multiply 360 (degree of circle) by percentage (percentage) to get the degree of the angle to be drawn.

four

Draw a plane circle

five

Measure the angle with a protractor and draw the radius.

Unit PS: 1 is unknown. Divide by it, find the number and then find its corresponding score.

② statistical chart of broken line

1

Organize data according to statistical data.

2

Draw the vertical axis first, then the horizontal axis. Both vertical and horizontal directions must have units. According to the size of the paper, make sure to use a unit to represent a number.

three

According to the number, draw points at appropriate positions on the vertical and horizontal axes, and then connect the points in turn with line segments.

③ Bar chart

1. According to the size of the drawing, draw two perpendicular rays as the vertical axis and the horizontal axis.

2. Distribute the positions of the bars appropriately on the horizontal axis, and determine the width and spacing of the straight bars.

3. Determine the unit length on the vertical axis, and mark the quantity mark and measurement unit.

4. Draw straight lines with different lengths according to the size of the data. And mark it with a title.

5. If the bar is too small, you can paint the color on it appropriately.

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Play for a long time, can you understand?