If a graph is proportional, it displays a straight line that passes through the origin (0,0). This means that as one quantity increases, the other quantity increases at a constant rate. In mathematical terms, a proportional relationship can be expressed as \( y = kx \), where \( k \) is a constant. This indicates that the ratio of \( y \) to \( x \) remains constant. Thus, a graph representing a proportional relationship shows a linear relationship with a constant slope.
If a graph is proportional, what characteristic does it display?
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