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Tell whether x and y show direct variation

User Adaromas
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Two quantities x and y show direct variation when y = kx, where k is a number and k ≠ 0. The number k is called the constant of proportionality. The graph of y = kx is a line with a slope of k that passes through the origin. So, two quantities that show direct variation are in a proportional relationship.
User Pulkit Jha
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