On the same grid (east as positive $x$, north as positive $y$), a hospital is $3$ units west and $4$ units…

On the same grid (east as positive $x$, north as positive $y$), a hospital is $3$ units west and $4$ units south of the origin. Its coordinates are:
  1. $(3,-4)$
  2. $(-3,4)$
  3. $(-3,-4)$
  4. $(4,-3)$

Solution

West $\Rightarrow x=-3$, south $\Rightarrow y=-4$. So the hospital is at $(-3,-4)$.

Asked in: IMO

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