Differential Equations

Let a smooth curve \(y=f(x)\) be such that the slope of the tangent at any point \((x, y)\) on it is directly proportional to \(\left(\frac{-y}{x}\right)\). If the curve passes through the points \((1,2)\) and \((8,1)\), then \(\left|y\left(\frac{1}{8}\right)\right|\) is equal to