Writing Equations for Proportional Relationships

This video tutorial teaches how to write an equation expressing the relationship between two proportional quantities by finding the constant of proportionality. It explains that if x and y are proportional, the equation y = kx can be used, where k is the constant found by dividing y by x. The video provides an example using feet and yards, demonstrating how to plot points on a graph and determine the constant proportionality, which is 3 in this case. The lesson concludes by reinforcing the concept of proportional relationships and their graphical representation as a straight line through the origin.

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