Determine whether $x \equiv y$, $xy \geq 1$, $x = y^2$ are reflexive, symmetric, antisymmetric, or transitive

Question

Let $x$ and $y$ be integers. Determine whether the following relations are reflexive, symmetric, antisymmetric, or transitive.

1. $x \equiv y \mod{7}$
2. $xy \geq 1$
3. $x = y^2$

So far in class we have only determined whether sets are reflexive, symmetric, antisymmetric, or transitive. How should I approach this when given problems like such?