Which linear graph represents a proportional relationship? A graph of a straight line that passes through the points 0 comma 1 and 3 comma 0. A graph of a straight line that passes through the points 0 comma 0 and 1 comma 2. A graph of a straight line that passes through the points 0 comma negative 4 and 1 comma negative 4. A graph of a straight line that passes through the points 1 comma 0 and 1 comma 1.