Google!

Problem:



Solution:

3a) $d(0)$ is simply the price when Google stock was opened. Therefore $d(0) = 85$.
3b) $d(11)$ is the price when Google stock was opened for 11 years. $2004 + 11 = 2015$, therefore it is asking for the stock price in 2015, therefore $d(11) = 630$.
3c) That is $\frac{630}{85} \times 100\% =  741.1764705882353\%$.
3d) The percentage change is $\frac{630 - 85}{85} \times 100\% = 641.1764705882353\%$.

Bonus:

The average rate of change of Google's stock price is $\frac{630 - 85}{11} = 49.54545454545455$.

$q(n) = 85 + \frac{545n}{11}$

$p(n) = 85 \times (\frac{630}{85})^{\frac{n}{11}}$