The function $r$ pives the weekly profit, in thousand dollars, that an airline makes on its flights from Boston to wauhington D$.$C$.$ ahen the ticket price is $p$ dollars. Interpret the following.

$($a$)n(90)=15$

When the tidet price is s $,$ the weekly profit to the airline on fights from Boston to Washington is $5$

$($b$),r(90)=4\mathrm{.}5$

When the ticket price is $5,$ the weekly profit to the airline on fights from Boston to Washington is $$ Expressing E $$ by $5q,$ Your answer cannot be understood or graded. More Information per dollar $($of ticket price$).$

$($c$)f(115)=-3$

When the ticket price is $5,$ the weekly profit to the airline on flights from Boston to Washington is devening $0$ by $5$ per dollar $($of ticket price$).$