Question 17
Given the distinct points $P(x_1,y_1),$ $Q(x_2,y_2)$ and $R(x_1+x_2,y_1+y_2).$ Line segments are drawn connecting these points to each other and to the origin $O.$ Of the three possibilities: $(1)$ parallelogram, $(2)$ straight line, $(3)$ trapezoid, figure $OPRQ,$ depending upon the location of the points $P,$ $Q,$ and $R,$ can be: