Question 1108055
{{{t=4}}}


Points (t,P) ae  (0,340) and (4,285).


You can use the two points for the slope.
{{{(285-340)/4}}}

{{{-13.75}}}


-

{{{P=-13.75*t+b}}}


The vertical axis intercept was already given in description.


{{{highlight(P=-13.75t+340)}}}