Algebra word problem

Question

A car has a 16 gallon gas tank. On a long highway trip, gas is used at a rate of about 2 gallons per hour. The gallons of gas g in the car's tank can be modeled by the equation g(t) = 16 - 2t where t is the time in hours. Identify the domain and range of the function.

Answer 1

g(t) = 16 - 2t

 

as t = time in hour ( so it can not be negative)

 

so domain is

{ t| t≥ 0}

 

range is 

g(t) ≥ 16