A direct variation function contains the points 2 comma 14 and 4 comma 28 Which equation represents the function?

A direct variation has the form y = kx, where k is the constant of variation. Using the point (2, 14), k = 14 ÷ 2 = 7; the other point also gives 28 ÷ 4 = 7. Therefore, the equation is y = 7x, choice B.

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