Which linear graph represents a proportional relationship?

A graph of a straight line that passes through the points 0 comma 2 and 1 comma 2.

A graph of a straight line that passes through the points negative 1 comma 0 and negative 1 comma 1.

A graph of a straight line that passes through the points 0 comma 0 and 1 comma negative 2.

A graph of a straight line that passes through the points 0 comma 2 and 2 comma 3.