Graph is a set of points on a plane with Cartesian coordinates #(x,y)# that satisfy certain condition (like an equation, or an inequality).
In our case the condition is #x> -4# with no restrictions for #y#. That means that any point with Cartesian coordinates #(x,y)#, where #x> -4# and any #y# would be a part of this graph. This is not a curve on a plane, but an entire area.
Draw a vertical line through point #x= -4# on the X-axis. All points of a plane that lie on this line satisfy the condition #x= -4#. All points of the plane to the left of this line satisfy the inequality #x< -4# and, finally, all points to the right of this line satisfy the inequality #x> -4#. This latter set represents a graph we need.
