[color=#b20ea8][/color]To find derivative of function :f(x) =x^2 + a [br][br]Procedure can be noted from the Algebra view ( Left side).[br][br]When slope of every point on the curve is determined they locus gives us the derivative.[br][br]Here blue line is the derivative of the function.[br][br]Change the value of a on the slider.[br]Change the function.Still we find the derivative remains the same.