Relations in Discrete Math/ tables

Question

Does anyone know how to make this table? I can do a table with normal values but the $x^2$ throws me off.

'Write the relation as a table, the relation $\mathbb{Z}$ on $\{1,2,3,4\}$ by $(x,y) \in \mathbb{Z}$ if $x^2\geq y$.'

Thanks!

Answer 1

$$\begin{matrix} xRy & 1 & 2 & 3 & 4 \\ 1 & T & F & F & F \\ 2 & T & T & T & T \\ 3 & T & T & T & T \\ 4 & T & T & T & T \end{matrix}$$

You simply need to evaluate the truth value of each relation. $2R1\iff 2^2\geq1$, so $2R1$ is true. Comment if you have questions, there's nothing complicated about this.