2x + 6 > 0 2x > -6 x > - 3
The graph of x = -3, is obtained by drawing a vertical line at x = -3 on the x-axis and dotted line is drawn.
(0, 0) substituted in the inequality gives 0 > -3 which is true.
∴ The region is the one that contains (0, 0)
(or alternatively the inequality is x > -3, we shall mark the region towards the right of the vertical line)
The graph is: