Question 802106
The question about P is simply a linear relationship.  The question about Q is more interesting, being exponential growth.


Helping for Q:


Time 0, Q=15.
Time 1, Q=15*1.09
Time 2, Q=15*1.09*1.09
.
.
and the pattern will be for time {{{t}}},______________ {{{highlight(Q=15*(1.09)^t)}}}