Sure, here's an example Python script that uses the Average Rate of Change formula to calculate the derivative of a function at a specific point:
``` 
def derivative(f, a, b):
    # A(x) = (f(b) - f(a)) / (b - a)
    return (f(b) - f(a)) / (b - a)

def function(x):
    # Define your function here
    return x ** 2

# Get user input for x
x = float(input("Enter a value for x: "))

# Calculate the derivative of the function at x
a = x - 0.1
b = x + 0.1
derivative_value = derivative(function, a, b)

# Output the result
print(f"The derivative of the function at x={x} is {derivative_value}")
``` 
Here's how this script works:

- The derivative() function takes in a function f, and two values a and b. It uses the Average Rate of Change formula to calculate the derivative of f between a and b.
- The function() function defines the function you want to take the derivative of. In this example, it's a simple function that returns the square of its input.
- The script prompts the user to enter a value for x.
- The script then calculates the derivative of the function at x by choosing two points a and b that are very close to x (in this case, a = x - 0.1 and b = x + 0.1), and passing them to the derivative() function along with the function function().
- The result is printed to the console, giving the value of the derivative of the function at x.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence