Direct Proportion and Inverse Proportion Class 8 NCERT
Sometimes a change in the ratio of one amounts to a change in the ratio of another! For example, the more apples you buy, the more money you have to pay. Similarly, increasing the speed of a vehicle will reduce the time it takes to cover some distance. The first is an example of direct proportionality, and the second is an example of measurements of inverse proportions.
Direct and inverse ratios show how two quantities are related. Their relationship is known as direct or inverse. The symbol used to indicate proportionality is ‘∝. ‘ For example, if ‘a’ is said to be proportional to ‘b,’ it gets represented as “a∝b.” Furthermore, when we say ‘b’ is the inverse of ‘a’, it is represented as a∝ 1 /b
