Problem: The points that satisfy the system , where the symbol "<" means "less than," are:
Answer Choices:
A. only two points
B. an arc of a circle
C. a straight line segment not including the end-points
D. a straight line segment including the end-points
E. a single point
Solution:
is the set of points interior to the circle . Let the straight line intersect the circle in and . Then all the points of the straight line segment , except and , are also interior to the circle. is correct.