Difficulty: Easy

Average Score: 88%

A function should determine the average of x and y. What should be the function's parameters and return value(s)?

Rationale

Parameters: x, y Return value: average

To calculate the average of two numbers, the function must accept both numbers as parameters and return the computed average. This ensures that the function has the necessary inputs to perform its intended operation and provides the correct output.

A (Parameters: x, y Return value: average) CORRECT

This option correctly identifies the requirements for the function to calculate the average. It specifies that the function should accept the two numbers, x and y, as parameters and return their average, which is the expected behavior for such a function.

B (Parameters: none Return values: x, y) YOUR ANSWER

This choice incorrectly suggests that the function should take the average as a parameter and return the original numbers x and y. This is not appropriate for an average function, as it does not align with the purpose of calculating the average from two inputs.

C (Parameters: average Return values: x, y) YOUR ANSWER

This option implies that the function does not require any parameters, which is incorrect. A function designed to compute the average of x and y must accept those two specific numbers as inputs in order to perform the calculation.

D (Parameters: x, y, average Return value: none) YOUR ANSWER

This choice suggests that the function requires an average parameter and does not return a value, which is misleading. For a function meant to calculate the average, it should not need an average as an input, and it must return the calculated average.

Conclusion

To accurately compute the average of two numbers, the function must take x and y as parameters and return the computed average. This aligns with the fundamental purpose of the function, ensuring it operates correctly to yield the expected result. The other options either misinterpret the required inputs or fail to provide a valid return value, highlighting the importance of correctly defining function parameters and outputs.

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