Direct Proportion and Inverse Proportion


Subject: Mathematics
Topic: Simple Ratio
Sub-topic: Inverse Proportion

Grade: 9
Date: 17 February, 2011

General Objective: By the end of the end of the lesson, the student should be: Knowledgeable of inverse proportion;


Specific Objectives: By the end of the lesson student should be able to:
          • Explain when a proportion is said to be ‘inverse‘
          • Perform inverse proportion calculation;

Instructional
Materials: Chart, worksheet and stop watch


Methodology: Questioning and Guided Discovery.

Previous Knowledge: Students should already know:
What is meant by inverse?
How to solve direct proportional problems;


Definition and Explanation

Examples and Videos