Question

This function models the relationship between the hours worked, x, and the amount of money earned, f(x).

f (x) = 10.25 x

Which choices could be elements of the domain of the function? Check all that apply.
5
200
25.5
StartFraction 14 Over 3 EndFraction
77One-half
–10
–43.5
–113Four-fifths

Answer 1

Because x represents hours worked it must be a nonnegative number (hours can be fractional). So the admissible choices are:
5, 200, 25.5, 14/3, and 77 1/2.

The negative values (−10, −43.5, −113 4/5) are not allowed.