In calculus, a stationary point is a point at which the slope of a function is zero. Stationary points can be found by taking the derivative and setting it to equal zero. For example, to find the stationary points of one would take the derivative: and set this to equal zero. This gives the x-value of the stationary point. To find the point on the function, simply substitute this value for x in the original function. So the coordinates for the stationary point would be . One can then use this to find if it is a minimum point, maximum point or point of inflection.