q:
A trial was conducted on a volunteer smoker that involved the measurement of nicotine levels in the blood after smoking one cigarette.
Two series of blood samples were taken.
Series $A$ blood samples were taken every $4$ minutes for the first $30$ minutes only and series $B$ samples were taken every $10$ minutes for the entire $2\frac{1}{2}$ hours the experiment was conducted over. The nicotine level for each sample was measured in nanograms per millilitre.
This specific model for this experiment becomes $N(t) = \frac{640t}{(t^2 + 400)}$
what is series $A(t)$ blood samples and series $B(t)$ blood samples to get $N(t) = \frac{640t}{(t^2 + 400)}$, how do they get this rational function?, they give one graph, is this graph plotted from N(t) or N(t) taken from this graph?
if N(t) taken from this graph how to frame this function from this graph?
more about this on this page link