The graph representing a proportional relationship ALWAYS goes through the origin (0, 0).
Recall:
- A proportional relationship graph represents a relation between two variables that are directly proportional to each other.
- In a proportional graph, the constant of proportionality, k, remains the same.
- The graph attached below shows a proportional graph between time and water used.
In the proportional relationship graph, the line goes through the origin (0, 0) as shown in the image attached below.
- Therefore, the graph representing a proportional relationship ALWAYS goes through the origin (0, 0).
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