Learn with Mentor · 7 min
Find the Constant of Proportionality from a Graph
Find k from a proportional graph by using a point on the line, calculating y / x, and interpreting the result as the slope through the origin.
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What are we learning?
A proportional graph is a straight line through the origin. Its constant of proportionality, k, is the slope of that line: how much y changes for each 1 unit of x.