Question

The daily expenses for each of a transportation service company’s trucks is given by the function d(x) = 15 + 0.5x, where d(x) is the daily expense per truck (in dollars) and x is the daily mileage. The input for the function includes _______ .

Identify the domain of the given function.
a. all fractions
b. all integers
c. all real numbers
d. all positive real numbers

Answer 1

The input for the function includes all positive real numbers. The correct option among all the options that are given in the question is the fourth option or option "d". The other choices are incorrect and can be avoided. I hope that this is the answer that has actually come to your desired help.

Answer 2

For this case we have the following equation:

`image`

Where, by definition, we have the following variables:

d (x): the daily expense per truck (in dollars)

x: the daily mileage

Therefore, the domain of the function is given by:

`image`

Equivalently:

[0, ∞)

Answer:

The input for the function includes all positive real numbers

option d.