Standard X: Geogebra Practical 12: Alternate Method of obtaining Frequency Polygon

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ICT Standard IX

ICT Standard X

Geogebra Practical 12: Alternate Method of obtaining Frequency Polygon The Percentage of Literate males between the ages of 15 to 45 in a colony is given in the table below.

Class	15-20	20-25	25-30	30-35	35-40	40-45
Percentage	42	38	35	26	16	5

Draw a Histogram and Frequency Polygon.

The first five steps given below are the same as the ones given in the first method for doing this practical. 1. Open Geogebra. From the ‘Options’ Menu click ‘Advanced.’ See Figure 1 below. Select ‘Preferences -- Graphic’.

Figure 1.

2. Click on x-axis Tab and click on Label. Enter 'Age' as label. See Figure 2 below.

Figure 2.

3. Click on Y-axis Tab and click on Label. Enter ‘Percentage’ as label. See Figure 3 below.

Figure 3.

4. Click on Grid tab. Select show Grid. Enter grid distance as ‘2.5’ for x-Axis. See Figure 4 below.

Figure 4.

5. In the Input Box at the bottom of the Screen type, histogram[{15,20,25,30,35,40,45}, {42,38,35,26,16,5}] and press Enter. The required Histogram will be displayed. Use the Mouse Scroll button and the Move Graphics View Tool from Tool 11 to position the graphics area properly, as shown in figure 5 below.

Figure 5.

6. In the command box at the bottom of the Geogebra window type FrequencyPolygon[{15,20,25,30,35,40,45}, {42,38,35,26,16,5}]. The Frequency Polygon along with the Histogram will be displayed.

Figure 6.

Save or Print your file as required.

Some other examples of commands that can be run from the Input Command Box are given here.

George Ferrao