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. Start with the equation of direct variation y = kx. Substitute in the given values for x and y to get . Solve for k to get . Write the direct variation equation with the value found for k. The equation is
Accepted Solution
A:
Answer:y = -1/2 xStep-by-step explanation:Follow the directions "Complete the steps to write the equation of direct variation. Start with the equation of direct variation y = kx. Substitute in the given values for x and y to get . Solve for k to get . Write the direct variation equation with the value found for k."y = kx substitute y = -4 and x = 8.-4 = k*8-4/8 = k-1/2 = kSo the equation is y = -1/2(x).