First find the equation of the line, the y intercept is -5,
So y= mx+5
Then the gradient is -2 (rise/run)
so y= -2x+5
Then just make it an inequality with the inequality sign, clearly it is a greater than or equal to inequality as the shaded part is going up and the line is a solid line, so
y>(line under) -2x-5
hope that made any sense