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Checking and securing understanding of direct proportion graphs

Lesson 3 / 9

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Lesson outcome

I can identify direct proportion graphs from their features and can use the graph to create an equation to algebraically model this relationship.

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Direct proportion can be recognised graphically. A direct proportion graph is always a straight line through the origin. The gradient is the constant of proportionality. The equation of the line can be found and this is the algebraic model of the relationship.

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