Final answer:
To find the net change of a function, substitute the initial and final variable values into the function and subtract the initial function value from the final function value.
Step-by-step explanation:
To determine the net change of a function between two values of a variable, you need to substitute the initial and final values of the variable into the function's equation. Then, calculate the change (Δ) by subtracting the function's value at the initial point from the function's value at the final point. This method is based on the concept that the net change in a quantity is the final value minus the initial value.
For example, if we have a function f(x) and we are looking to find the net change from x = a to x = b, we would calculate f(b) - f(a). This gives us the net change in the function values from x = a to x = b.