(a) Which of the following points are on the section of the line obtained by restricting to nonnegative numbers (for each, enter Y if the point is on the section, and N if not)? : : : Then, give one more point that is on the section of the line obtained by this restriction:
(b) What are the endpoints of the line segment obtained by restricting to ? left endpoint : right endpoint :
(c) How should be restricted to give the part of the line above the -axis (give your answer as an interval for , for example, (3,8) or [-2,Inf))? must be in :