Plot the following points:

a. -5,0

b. 0,-5

To plot the points -5,0 and 0,-5 on a graph, you would first draw a coordinate plane with horizontal and vertical axes labeled with numbers. Then, locate the point (-5,0) by moving 5 units to the left from the origin (0,0) and marking a point on the horizontal axis. Finally, locate the point (0,-5) by moving 5 units downwards from the origin that you marked earlier and marking a point on the vertical axis. The result should look like this:

(-5,0) is located at a point 5 units to the left of the origin on the x-axis.
(0,-5) is located at a point 5 units downwards from the origin on the y-axis.

Please note that due to the limitations of this text-based format, I cannot provide you with an actual visual representation of the graph.