For the first point, you can see that the only change between this and the point that is already plotted is
This means that point (-c, d) is a reflection of the y-axis of the point (c, d). When graphing it you have
For the second point, you can see that the change between this and the point that is already plotted is
This means that the point (-e, -f) is a reflection with respect to the line y = -x of the point (e, f). When graphing it you have
For the third point, you can see that the change between this and the point that is already plotted is
This means that the point (c, -d) is a reflection of the x-axis of the point (c, d). When graphing it you have
Finally, for the fourth point, you can see that the change between this and the point that is already plotted is
This means that point (-e, f) is a reflection of the y-axis of the point (e, f). When graphing it you have