SLOPE can be WRITTEN as\(\FRAC{y-f(a)}{X-a}=\frac{f(a)-f(b)}{a-b}\) let y = f(x) = 0\(\frac{-f(a)}{x-a}=\frac{f(a)-f(b)}{a-b} \) Therefore,x = \(\frac{bf(a)-af(b)}{f(a)-f(b)}\).