The function f(x) is the total amount spent at a store, when purchasing x items that are $5 each and the items are not taxable.

What is the practical domain for the function f(x)?

A. all positive integers that are multiples of 5

B. all whole numbers

C. all positive integers

D. all real numbers

The domain is all possible values of x. Here, x is the number of $5 nontaxable items. So x must be an integer, and it can't be negative. It is possible for x to be 0. So x is all whole numbers.

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bhoopendrasisodiya34 bhoopendrasisodiya34 · Answer 2 · 2022-05-20T08:30:22+02:00

The practical domain for the function f(x) which represents the total amount spent at a store is all whole numbers. Option B is correct.

What is domain of function?

Domain of a function is the set of all the possible input values which are valid for that function.

The function f(x) represents the total amount spent at a store. The purchasing number of x items which are $5 each and the items which are not taxable is represented by x.

Thus, this function can be given as,

f(x)=5x

Now the domain of a function is the set of all the possible input values which are valid for that function. Thus, for this case the domain is,

-∞<x<∞

(-∞,∞)

For the practical domain, the numbers should be whole number to avoid negative amount value and integer amount.

Hence, the practical domain for the function f(x) which represents the total amount spent at a store is all whole numbers. Option B is correct.

Learn more about the domain of the function here;

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