It is a poorly worded problem. The actual problem says that I am given the resultant force on a body and am asked to plot that force vs acceleration. Then I am asked what shape is plotted, if the shape that is created passes through the origin, and what quadrant(s) it is in? Since I wasnt given...
If plotting F=ma on a graph with F as one axis and a as the other, would the line be in both quadrant one and three since the force vector, and subsequent acceleration vector, could be negative?