Answer
The region includes the points which are to the right of the vertical line $x = 1$, (as well as the points on this line), and below the horizontal line $y = 3$, (but not including the points on this horizontal line).
Work Step by Step
$\{(x,y)\vert~ x \geq 1~and~y \lt 3~\}$
The region includes the points which are to the right of the vertical line $x = 1$, (as well as the points on this line), and below the horizontal line $y = 3$, (but not including the points on this horizontal line).
