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16-10-2017
Mathematics

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A direct variation function contains the points (2, 14) and (4, 28). Which equation represents the function?

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16-10-2017

A direct variation has a constant slope, i.e. (y/x)= constant.

Both of the given two points give a slope of (y/x)=14/2=28/4=7, so the equation of the function is
y/x=7, or simply
y=7x

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