Question 23

Parameters: x, y Return value: average

The function should take two parameters, x and y, to compute their average and return that value. This aligns with the requirements of averaging two numbers, where both inputs are necessary for the calculation.

A) Parameters: x, y Return value: average

This option is correct as it specifies that the function requires two parameters, x and y, to calculate the average. The return value being the average directly reflects the intended purpose of the function.

B) Parameters: none Return values: x, y

This option is incorrect because a function that does not take parameters cannot compute the average of x and y. Additionally, it suggests returning the values x and y themselves, rather than their average, which does not fulfill the function's purpose.

C) Parameters: average Return values: x, y

This option is incorrect as it implies that the average itself is a parameter, which does not make sense in the context of calculating an average. Furthermore, returning x and y does not align with the requirement to return the average of the two numbers.

D) Parameters: x, y, average Return value: none

This option is also incorrect because it incorrectly suggests that the function takes an additional parameter, average, which is not needed for the calculation. Additionally, returning none fails to provide the calculated average, which is the primary objective of the function.

Conclusion

Option A is definitively correct as it accurately describes a function that takes the necessary parameters to compute and return the average. The other options either misinterpret the requirements or fail to provide a valid mechanism for calculating and returning the average value. Thus, only option A meets the criteria set by the question.