The constant of proportionality in a linear equation that passes through the origin can be identified with the slope of the line. Since the line has a slope of 4, this means that for every 1 unit increase in the x-value, the y-value increases by 4 units. Therefore, the constant of proportionality is 4.
A graph shows a line passing through the origin with a slope of 4. What is the constant of proportionality?
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