If $y$ is inversely proportional to $x$, the graph of $y$ versus $x$ is:

If $y$ is inversely proportional to $x$, the graph of $y$ versus $x$ is:
  1. A straight line through origin
  2. A rectangular hyperbola
  3. A parabola
  4. A horizontal line

Solution

Inverse proportion gives $y = \dfrac{k}{x}$, i.e. $xy = k$, a rectangular hyperbola.

Asked in: IMO

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