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. Use the given values to find k: k = y/x = −4/8 = −1/2. Therefore, the equation is y = (−1/2)x, which is choice D.

AI-written and checked against the verified answer.