Final answer:
The graph of a ratio relationship passes through (0, 0) because it represents the starting point where both quantities have a value of zero.
Step-by-step explanation:
Equivalent ratios are ratios that have the same value. They can be written in different forms but represent the same relationship between two quantities. When a graph of a ratio relationship is drawn, the point (0, 0) is always included because it represents the starting point where both quantities have a value of zero.
For example, let's consider the ratio relationship between time and distance traveled. If we have a ratio of 1:2, it means that for every 1 unit of time, we travel 2 units of distance. If we graph this relationship, the point (0, 0) represents the starting point where no time has passed and no distance has been traveled.
Therefore, the graph of a ratio relationship passes through (0, 0) because it represents the starting point of the relationship where both quantities have a value of zero.