How do you know if a Function is Increasing or Decreasing? https://www.youtube.com/watch?v=KxOp3s9ottg Increasing and decreasing functions Definition:(1) A function f is said to be an increasing function in ]a,b[, if x1 < x2 ⇒ f(x1) < f(x2) for all x1, x2 ∈ ]a,b[. (2) A function f is said to be a decreasing function in ]a,b[, if x1 < x2 ⇒ f(x1) < f(x2), ∀ … [Read more...] about How do you know if a Function is Increasing or Decreasing?