The graph represents a proportional relationship because the graph is a straight line that passes through the origin.
A graph represents a proportional relationship when there is a straight line that passes through the origin of the graph. The slope is also equal to the unit rate.
The equation that represents the straight line is y = mx + b
Where:
Please find attached an image of the graph. To learn more about proportional relationships, please check: https://brainly.com/question/12917806