Solve the following inequality graphically in two-dimensional plane:
y + 8 ≥ 2x

First, we draw a dark line to represent the graph of straight line y + 8 = 2x.
i.e.,       2x - y = 8
x             0              4
y            -8              0
Now, let us take a point O(0, 0), i.e, origin.
Substitute in given inequality, 0 + 8 ≥ 2(0) or 8 ≥ 0 which is true.
Therefore, origin is the solution of given inequality.
From these observations, the graph is given below, in which shaded region represents the solution of the given inequality.