Question

what is meaning of dircetly proportion

Answer 1

Answer:

Directly proportional: as one amount increases, another amount increases at the same rate. ∝ The symbol for "directly proportional" is ∝

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Answer 2

Answer:

When one quantity increases constantly or decreases constantly with respect to another quantity then the two quantities are called directly proportional to each other. In the airplane example, we would say that the quantity C is directly proportional to S multiplied by a constant (k).