Final answer:
To find the differential of a function, we need to take the derivative of the function. The derivative represents the rate of change of the function at any point.
Step-by-step explanation:
The differential of a function represents the rate of change of the function with respect to a given variable. To find the differential, we need to take the derivative of the function. The derivative represents the rate of change of the function at any point. For example, if the function is y = x^2, the derivative would be dy/dx = 2x. So, the differential would be dy = 2x dx.