👉 Rectifiable is a mathematical concept in calculus that refers to a function f(x) where its value at any point x on an interval [a, b] (where a and b are endpoints of the interval and f is continuous over that interval) can be calculated as follows: f(b)-f(a) / (b-a) This means that if we choose any two points in the interval [a,b], the difference between their values at those points will give us an estimate of the value of