Part A:
Given that <span>Box office revenue at a multiplex cinema in paris is
euros per showing when the ticket price is p euros.
When p = 9,
Part B:
The linear approximation of the change in a function Δf(x) using a value, a, close to x is given by:
Given that </span><span>, then 
</span><span>Using a = 9, we have:
Thus, If p is raised by 0.5 <span>euros, then
Part C:
</span></span><span>The linear approximation of the change in a function Δf(x) using a value, a, close to x is given by:
Given that </span><span>, then
</span><span>Using a = 9, we have:
Thus, If p is lowered by 0.5 <span>euros, then
</span></span>
Given that <span>Box office revenue at a multiplex cinema in paris is
When p = 9,
Part B:
The linear approximation of the change in a function Δf(x) using a value, a, close to x is given by:
Given that </span><span>
</span><span>Using a = 9, we have:
Thus, If p is raised by 0.5 <span>euros, then
Part C:
</span></span><span>The linear approximation of the change in a function Δf(x) using a value, a, close to x is given by:
Given that </span><span>
</span><span>Using a = 9, we have:
Thus, If p is lowered by 0.5 <span>euros, then