Demarco tracks his daily calories consumed for 30 days, using the MyFitnessPal app.
The first day, Demarco records that he ate 2,375
calories.
Each day, his calories decreased by approximately 45
calories
After 30 days, he stops using the app.

In the box below, enter the domain of the function
representing the number of calories he consumes, in
terms of the day.