Final answer:
The constant of proportionality, denoted by k, establishes the relationship between two directly or inversely proportional values in equations.
Explanation:
Constant of proportionality is a value that relates two quantities in a proportional manner. It is denoted by the symbol k and appears in equations where one value is directly or inversely proportional to another. For example, in the equation y = kx, k is the constant of proportionality.
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