Geogebra Practical 12 Standard X Information and Communication Technology

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ICT Standard IX

ICT Standard X

Geogebra Practical 12 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.

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. Click on Tool 2 and Select ‘Segment between two points’, as shown in Figure 6 below.

Figure 6.

7. Click on x-Axis at 12.5 and then on each class mark on the top of the histogram. Click on 47.5 on the x-Axis to complete the Frequency Polygon. The required Frequency Polygon will be obtained. In the Algebra section under Points, click on the green buttons indicating the points. This will remove the labeling of the points from the Frequency Polygon. See Figure 7.

Figure 7.

Save or Print your file as required.

An alternate method of obtaining a Frequency Polygon can be found here.

George Ferrao