The graph of y = 500(0.85)x represents the number of milligrams of a drug, y, are left in a patient’s system x hours after it was administered.
If the graph were extended, what would be the equation for the asymptote?
x = 0
y = 100
y = 0
x = 100
The equation for the asymptote would be y = 0.
As x approaches infinity, the drug will decay to zero milligrams in the patient's system. Therefore, the y-value of the asymptote is 0.