
Closed half plane: When the boundary line is included the region is called closed half plane, and the boundary line is indicated by dark line.
Open half plane: Draw a graph for x > 2: First we draw a straight line for x = 2, it means that in this straight line the x coordinate is constant that is 2.
x > 2, means that x= 2 is not belongs to the region x > 2 belongs tot he region, we take dotted line for the straight for x = 2, because it is not belongs to the region.
Directions: Draw the graphs for: x > 1, x > 2, x > 3, x > 4, and x > 6. Also write at least five examples/graphs of your own. 