Question

A construction company uses the function f(x), where x is the number of people working on a project, to model the amount of money it spends to complete a project. What would a reasonable domain be?

All integers
Real numbers
Positive real integers
Positive integers

Answer 1

Please use "^" to denote exponentiation: f(x) = x^2 + 3x + 5.

Because this is a polynomial, the domain consists of the set of all real numbers.

Explanation:

Answer 2

• Positive integers

Explanation:

The domain is the people and the range is the money spent

People would be counted as positive integers, only the last answer choice considers this.

So the answer is:

• Positive integers