Suppose y varies directly with x. If y = –4 when x = 8, what is the equation of direct variation? | Complete the steps to write the equation of direct variation.

In a direct variation, y = kx, where k is the constant of variation. Using y = –4 and x = 8, k = y/x = –4/8 = –1/2. Therefore, the equation is y = –1/2x, so the correct choice is –1/2.

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