Apples at the local farmer's market cost $1.25 per pound.

To write a function that calculates the total cost of apples based on the number of pounds, we can define the function f as follows:

def f(x):
    price_per_pound = 1.25  # Cost of apples per pound
    total_cost = price_per_pound * x  # Total cost calculation
    return total_cost

In this function:

• x represents the number of pounds of apples.
• price_per_pound is set to $1.25, which is the cost of apples per pound.
• total_cost is calculated by multiplying the price per pound by the number of pounds.
• Finally, the function returns the total cost.

You can call this function with different values of x to find out the total cost for that number of pounds of apples. For example:

print(f(2))  # This will give you the cost for 2 pounds of apples