Which statement best describes a graph of paired points that form a proportional relationship?

a. A straight line can be drawn through all the points, and the line passes through the point (0, 0) .

b. A straight line can be drawn through all the points, and the line passes through the point (2, 1) .

c. A straight line can be drawn through all the points, and the line passes through the point (10, 5) .