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

Question

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

rhystic · Answer

d. all positive real numbers.   

 A real number is both irrational and rational numbers. you have a fraction and a whole number up there plus they are all positive as is the d(x).

anonymous · Answer

Are you 100% on this?

rhystic · Answer

the other answers just dont make sense except for c. because all the numbers up there are real numbers however a positive real number is a number on the right hand side of zero which all the above numbers are... so yeah I am sure.

anonymous · Answer

Thanks! Earned yourself a new fan! I was debating whether c or d with my mom. she was right. -.-