Question

A carton of eggs contains 12 eggs. Each carton costs 1.89.

A function, f(x), is written to represent the cost of purchasing x carton of eggs.
What is the practical domain for the function f(x)?

1. all whole numbers
2.all whole numbers that are multiples of 12
3.all real numbers
4.all positive integers

Answer 1

Option: 1 is the correct answer.

1. all whole numbers

Explanation:

It is given that:

A carton of eggs contains 12 eggs.

Also, cost of each carton is: 1.89

This means that the cost of purchasing x cartons is given by:

f(x)=1.89x

As the number of cartons that one would buy would be as a whole.

Hence, the practical domain for the function f(x) is:

1. all whole numbers.