We see a straight line that cuts the x-axis at x=50 and y-axis at y=50.
The shaded region is to the right of the line. Hence, we need to look at the ≥50 (greater than or equal to sign).
Only options 2 and 4 match this.
Now, we have a dots (dashes) for the other line. Hence, a value on that line is not part of the feasible region, it's a strict inequality (no equal to), only option 4 matches this description.
