Writе a call to function passing it rainfall

calculateAverage(rainfall);

Explanation:

The above written statement is for calling a function calculateAverage() in the main function passing rainfall as the argument in it.

Always remember when calling a function you should store the result of the function in the same return type as the function except void.If the return type of the function is void then you don't need to store it in any variable.

answer; (wage) income