The following data shows the amount of medication (in milligrams) in a patient's blood tt minutes after taking the medication has been consumed.

Which of the following models is the most appropriate model for this quantity?

t	Amount (mg)
10	45
40	27
70	23
100	20
130	18
160	17
190	16

a polynomial model

a power function model

a logarithmic model

an exponential model

a linear model