Theory question 104
Data PresentationIn a certain school, the lesson periods for each week are as itemised below: English 10, Mathematics 7, Biology 3, Statistics 4, Igbo 3, others 9. Draw a pie chart to illustrate this information.
Show the model answer
Model answer
Total periods = 10 + 7 + 3 + 4 + 3 + 9 = 36.
Angles (× 360°/36 = 10° per period): English 100°, Mathematics 70°, Biology 30°, Statistics 40°, Igbo 30°, Others 90° (total 360°).
Draw a circle, measure the sectors with a protractor and label each sector.
Explanation
Each period is worth 360° ÷ 36 = 10°.