When f is equal to 2 and g is equal to 8 , n is equal to 4 If n varies jointly with f and g , what is the constant of variation?

When n varies jointly with f and g, the relationship is n = kfg, where k is the constant of variation. Substitute n = 4, f = 2, and g = 8: 4 = k(2)(8), so k = 4/16 = 1/4. The constant of variation is 1 fourth, choice C.

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