On a number line, point $P$ has coordinate $x$ and $Q$ has coordinate $y$. $PQ$ equals

On a number line, point $P$ has coordinate $x$ and $Q$ has coordinate $y$. $PQ$ equals
  1. $|x - y|$
  2. $x - y$
  3. $x + y$
  4. $x \cdot y$

Solution

Distance is the absolute difference.

Asked in: MH-SSC-9

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