When a quantity gets larger or smaller, we say that it changes.
Sometimes a change in one quantity causes a change, or is linked to a change, in another quantity. If these changes are related through equal factors, then the quantities are said to be in direct proportion. Or one might say that the two quantities are directly proportional.
Inverse Proportion：
Probably better stated as a reciprocal proportion, the inverse proportions relates two quantities through factors that are multiplicative inverses. That is, through factors that are reciprocals, such as 3 and 1/3.
I think that you should include the formula for solving direct and inverse proportion, so as to make things easier to understand
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