Kelly's story is truly inspirational. Kelly has shown that pure determination, dedication and hard work can and does change a person's life. At Life Leisure we have loved being part of Kelly's journey.
In calculus (a branch of mathematics), a differentiable function of one real variable is a function whose derivative exists at each point in its domain.
(maths) (of a function or curve) changing gradually in value as the variable changes in value. A function f is continuous if at every value a of the independent variable the difference between f(x) and f(a) approaches zero as x approaches a Compare discontinuous (sense 2) See also limit (sense 5)