Introduction to Derivatives - Math is Fun "The derivative of f equals the limit as Δ x goes to zero of f(x+Δx) - f(x) over Δx " Or sometimes the derivative is written like this (explained on Derivatives as dy dx):
Derivative - Math. net The definition of the derivative is derived from the formula for the slope of a line Recall that the slope of a line is the rate of change of the line, which is computed as the ratio of the change in y to the change in x