👉 A monotreme is a point on an increasing or decreasing curve where the rate of change of the function is constant. In other words, a monotreme occurs when the derivative of a function at that point is equal to zero. This means that if we take the first derivative and set it equal to zero, we get a single value that represents the maximum or minimum value of the function at that point. A monotonically increasing function has a graph that goes up from left to right as you move