The function models the concentration, in milligrams per liter (mg/L), of a certain medication in a patient's bloodstream, where represents the number of days since the first dose was administered. If is graphed in the -plane, which of the following is the best interpretation of the -intercept of the graph in this context?
The concentration of the medication decreases by 25% each day.
The concentration of the medication after 1 day was 1200 mg/L.
The initial concentration of the medication in the bloodstream when the first dose was administered was 1200 mg/L.
The minimum effective concentration of the medication is 1200 mg/L.
