The option d ,that is , x= 5y is the equation that represents inverse variation between x and y.
1: A mathematical connection between two variables that can be described by an equation in which the sum of their products equals a fixed value.
2: an expression of inverse variation by an equation or function; contrast with direct variation.
In an inverse variation, the inverse percentage establishes the link between two quantities or variables. The inverse relationship between two quantities, x and y, is provided by:
x ∝ 1/y
or
x = k/y
xy = k
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