Whole Numbers 6

Mathematics J.S.S 3 First Term

Theme: Number and Numeration

Sub Theme: Whole Number

WEEK 6

Whole Numbers 6

Performance Objectives

Students should be able to;

1. Solve problems involving direct and inverse proportions
2. Apply direct and inverse proportions to practical problems

Direct and Inverse Proportion

Content

Direct Proportion

If two quantities are in direct proportion, as one increase, the other increases by the same percentage.

If y is directly proportional to x, this can be written as y ∝ x

A simple example of two things that are in the same proportion is the amount of apples you might buy and the amount you pay for them. If you buy twice as many apples as your friend, you pay twice as much.

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