Which graph of ordered pairs shows a proportional relationship?
A
On a coordinate plane, points (1, negative 2) and (2, negative 4) are plotted.
B
On a coordinate plane, points (negative 2, negative 2) and (1, 3) are plotted.
C
On a coordinate plane, points (negative 2, 1) and (1, negative 2) are plotted.
D
On a coordinate plane, points (2, 1) and (4, 3) are plotted.