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Answer:
Direct proportion or direct variation is the relation between two quantities where the ratio of the two is equal to a constant value. It is represented by the proportional symbol, ∝. In fact, the same symbol is used to represent inversely proportional, the matter of the fact that the other quantity is inverted here.
For example, x and y are two quantities or variables which are linked with each other directly, then we can say x ∝ y. When we remove the proportionality symbol, the ratio of x and y becomes equal to a constant, such as x/y = C, where C is a constant. But in the case of inverse proportion, x and y are denoted as x ∝ 1/y or xy = C.
Direct proportion Examples in Real Life
In our day-to-day life, we observe that the variations in the values of various quantities depending upon the variation in values of some other quantities