The derivative of x is equal to 1. The derivative of a function of a single variable at a chosen input value is the slope of the tangent line to the graph of the function at that point. In other words, the derivative of a function at a point represents the rate at which the function is changing at that point. The derivative of x can be found using different methods of differentiation, including the first principle of derivatives and power rule of differentiation. The power rule states that the derivative of x^n is nx^(n-1), so the derivative of x is 1x^(1-1) = 1.