C I think sorry if I’m wrong
1. find equation
general solutions are:

for P(0,-11)

⇒

for p(1,-13)

and

solve for a and b:

the total equation is now:

To find the x-intercept set y=0 and solve for x
<span>461.81 cm^3 .................................</span>
55/20 = 2.75
It costs $2.75 per person