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🚧 Setup for 8.1

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tomit4 2026-08-14 20:02:31 -07:00
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**Test Yourself**
1. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$x R y$ means that ____.
2. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$x \cancel{R} y$ means that ____.
3. If $R$ is a relation from $A$ to $B$, $x \in A$, and $y \in B$, the notation
$(y, x) \in R^{-1}$ if, and only if, ____.
4. A relation on a set $A$ is a relation from ____ to ____.
5. If $R$ is a relation on a set $A$, the directed graph of $R$ has an arrow
from $x$ to $y$ if, and only if, ____.