If y varies inversely as x and x is 6 when y is 13, what is x when y is 8?

Inverse variation means the product of x and y stays constant. Using x = 6 and y = 13, the constant is 6 × 13 = 78. When y = 8, x = 78 ÷ 8 = 9.75, so the correct choice is 9.75.

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